Maybe I'm again just an old man yelling at
, but tier lists aren't supposed to predict anything. They're just a summation of all MU charts, full stop. Hence they're backward-looking and a kind of report on the state of balance.
I realize enacting the formula of "old tier list + new patch notes = new tier list" is practically its own sport (and a fun one), but that isn't how they're actually made. So throwing statistics at a 'teir list' which was made that way seems like the long way around to saying what's evident in the definition.
Heck, in many cases one can't even say if adding 3 points to a char's low kick will affect any MUs at all, let alone a tier position. Esp. since, generally speaking, a tier isn't in any particular order, since the differences between same-tier chars is slight enough to be swamped by human factors.
[Btw, this post doesn't just apply to you. Just want to share my general thoughts since this is the current topic of the thread.]
New patch notes doesn't always directly affect tier lists. If they provide changes that do impact a character's viability, then yes, their tier positions may change.
For example, the changes in two of our most recent patches, 9.0 and 10.1 didn't really change up the meta too much. The most that these patches did, in my opinion, was adding Steve and Sephiroth to the game, but I personally doubt their presence in the meta is going to change the viability of characters ranked below them too much.
However, most tier lists throughout the ages, in all Smash games, gets adjusted whenever a character's meta changes. Did the character's standing in the meta improve, and continue to perform well or even better than previously? Or has the character in question stagnated in the meta? Does the character have the potential to maybe move higher/lower?
Those are merely some of the questions that are put in when making a tier list.
There are many examples of this in Ultimate, but two of the most notable examples are with two of the Mii Fighters:
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In the early to even mid meta, Brawler was considered to be one of the worst characters in the game, while Swordfighter was considered to be a solid high tier character mainly thanks to Gale Strike + Hero's Spin. Granted that in the case for Brawler, he was a legitimately terrible character at launch, but despite being heavily buffed later in patches, most players believe him to still be a very mediocre character, and the worst of the 3 Miis. Swordfighter enjoyed having some notable players and some notable players having him as a secondary, and was considered to be the best of the 3 Miis by a large margin.
However, the tables turned later on. Brawler would obtain some increasingly notable results as time went on, until Rizeasu would get very notable results in offline tourneys with Brawler. Now the character is considered to be mid to upper-mid tier, and the best of the 3 Miis by far. Swordfighter, on the other hand, got the opposite treatment. The character would soon be deemed as not as good as initially thought, and would soon be considered a mid tier. However, the character would stagnate even more as time goes on, with his main players either not placing that well and/or not being very active, and his secondaries would not pick him as often. The end result is that the character, both statistically and in public perception, plummeted drastically. Most players now view him to be in the low tiers, and likely the weakest of the 3 Miis. And the character, outside of Gale Strike and Chakram getting their distance reduced on the literal first patch of the game, didn't even receive any nerfs to affect this perception.
I notice people bring up the problem of that tier lists sometimes end up being merely a statistic of what is going on right now, and not actual, more everlasting placements based on theory/matchups. The thing is, in my opinion, tier lists end up always falling into this trap, NO MATTER what you value most when assembling a tier list. You have top players like ESAM mostly basing their lists mainly off of theory, putting current performances / results under the way-side, but you always see their lists constantly changing with time, even with patches not being a factor.
In Melee and Brawl, games that lack any sort of balance patches (outside of Melee PAL), we see the tier list change drastically with time, as new theories, strategies, and demonstrations of character strength would be displayed, improving/dropping off the character results as a result. We see the current official tier list of Melee, made at 2015, and we see many things that can be changed, such as the large rise of Yoshi, Marth stepping up to the plate, Dr. Mario falling off a bit, Ice Climbers losing Wobbling thanks to rulesets, and more. Melee tier lists, although more stagnate than other Smash games in terms of tier placements, is still changing a noticeable amount, and this is off a now 20 year old game.
Brawl also has made some notable tier changes in late 2013/early 2014 that isn't noted by the final official tier list, including characters like Zero Suit Samus, Fox, and Sonic rising a bit more in terms of perception, among other changes. I also still hold the belief that SSB4 deserved one more official tier list, as the final one was made at December 2017, and the meta changed quite a lot in 2018, including the rise of characters like Corrin, Lucina, Pac-Man, Duck Hunt, and Wario; the fall of characters like Diddy, Bowser, Pit, Robin, and Palutena; and many other changes.
No matter what, tier lists are going to change. Tier lists are always going to differ from player to player. It is impossible, especially this early in the meta, to come up with actual concrete tier lists that is going to be everlasting, that is going to be accurate with matchups + results + much more. Whenever I make a tier list myself, I always make them with the knowledge that it is inevitably going to be different in the future.