With this weekend, here is what I found to be the winners.
Biggest Winners
Big victory for Luigi, as Elegant wins Standoff 2019 in rather dominant fashion, defeating DeluxeMenu, Ismon, yeti, and Goblin. And there is still people who think he is lower mid tier at best...
Finally gets a relevant result in a major (other than Kome getting 7th at Umebura SP 4) worthy of a high tier. Kome's 3rd in Switchfest 2019, while defeating Marss, WaDi, and Shuton. Granted that Shulk experience, let alone against one of Kome's caliber, is difficult to come by, but this is pretty nice to the character overall.
There is, of course, going to be that one top player who is going to be like "this is the proof that Shulk is top tier", but we know better at this point (hopefully).
Tea scores an impressive 2nd placement at Switchfest 2019, defeating VoiD, Glutonny, Light, Shuton, and Kome. Pac-Man's overall results, although still pretty good, have slipped up a bit since season 1, so this is nice to see.
Samus gets a pretty nice boost this weekend thanks to Joker's 7th placement at Switchfest 2019, defeating WaDi, Sparg0, Rivers, and Nicko.
Other Winners
Both Chrom and Roy gets a notable boost after this weekend. Chrom has Rivers getting 13th at Switchfest 2019, Mr. R getting 9th at Switchfest 2019 with mostly Chrom, and MkLeo using Chrom to beat Gackt in both winner's and grand finals to win Uprising 2019. Roy has Goblin getting 2nd at Standoff 2019 and StroKaze getting 5th at Standoff 2019 using some Roy.
Uprising 2019 was filled to the brim with Joker players. RAIN got 4th with him, Eim got 3rd with him, and MkLeo won the whole thing using mostly him. This, combined with Zackray dropping Wolf (who is currently #1 on the Orion Stats) with Joker (who is #2) and R.O.B., Joker is only getting more popular. I won't be surprised if Joker gets the Wolf treatment by the dev team when it comes time for balance changes at this rate.
Mega Man got a pretty good showing this weekend, with yeti getting 3rd at Standoff 2019 and Kameme outright winning Switchfest 2019. The only reason why this isn't more notable to be part of "biggest winners", is because Kameme used plenty of Wario too.
Duck Hunt got a decent showing this weekend. While Raito getting 5th at Uprising 2019 isn't too notable, Wisdom getting 7th at Standoff 2019 while beating Denti, Fatality, and Shadow_PR is arguably more notable. Still good stuff to the duo regardless.
WaDi utilized Mewtwo to great effect during the Switchfest 2019 Kickoff, getting 3rd while beating Umeki, Tea, Tru4, and Puppeh before barely losing to Kameme. I am kind of surprised he didn't use him once during the actual Switchfest 2019 event. Maybe he didn't think it was ready to take him out of the oven yet? Regardless, it is a nice showing of the character.
Some Things to Point Out
MVD gets 9th at Switchfest, which is not only higher than what his results have been lately, but his loses was also respectable, losing only to Kameme and Marss. Definitely not the same heights as before, but it is still a step up. AvoiD and Ultimate Razor also got 9th and 13th, respectively, at Standoff 2019, so that is cool too.
He has seen various use throughout the weekend, with mixed results. DeluxeMenu instantly regretted using him against Elegant. Trela's Ridley was doing better than his Hero against Goblin, although he still ended up short. Joker, however, almost defeated Light using Ridley.
Trela got a nice 9th placement with solo Hero. Despite this, he didn't really beat anyone too notable, and he kind of got bodied by MuteAce and Goblin, especially the latter. Outside of this, Hero made virtually no impact in the other two notable tournaments.
Shadow_PR also got 9th in Standoff 2019. He did managed to beat N and Suarez, but when he ran into yeti and Wisdom, he kind of got bopped to the point of often switching to Palutena.