None of the characters I took a liking too turned out to be A or S tier, so my opinions on patches pertain more to the overall meta than the characters I specifically play.
I'm really happy that patches are being used to buff weaker characters, but I wish that they'd change up the way they're nerfing high tier characters.
In my opinion, nerf's should reduce the effectiveness of character's options, not take away options. The best example of this is Diddy Kong, who's up-air went from being a meme to a joke across 2 patches. IMO, in the case of Diddy and all future nerf's (hi Sheik), knockback and basic move mechanics (Bowser losing Bowsercide is understandable from a FG standpoint, but it's not exactly like he was high tier with it) should not be changed, as it can fundamentally change the way a character plays. Changes to damage, move priority, and weight are more preferable, since they affect the risk/reward ratio of certain tactics, without explicitly voiding them.
Changes to knockback are fine for buff's though, specifically giving character's throw combos.
Ultimately what I'm getting it as that I really want to start seeing weight changes.
In addition to fixing an inconsistency with Melee, making Mewtwo a heavyweight would make him at least somewhat viable (C/C+) and add to the extremely unrepresented heavy/floaty character combination. Slightly nerfing Sheik and 1.0.7 Diddy Kong's weight wouldn't take away from their gameplay, while simultaneously giving the rest of the cast the chance to nullify their amazing options with well placed reads in rage.