I guess now would be a good time to enter the discussion. Perfect wavelands in neutral can be really, really good when you mix up your options out of the waveland. Ftilt is my favorite since it covers so much ground (about 1/2 of Battlefield including the waveland), but jabs, smashes, Dtilt, and grabs are also great. You obviously can't spam this approach since it's telegraphed, but if you mix it up with flame cancels, spaced Fairs, or wavelands backward it can keep your opponent guessing.
I love Bowser's improved platform movement, too. Combined with his faster jumpsquat, jumping up and wavelanding off of platforms into Fairs or flame cancels is much more effective. It seems like these two changes, and his new dash attack, will make matchups against projectile-heavy characters a lot better. Also, wavedash OoS is actually viable now, which will make matchups against, for instance, Marth and Roy even better than they were in 3.02.
The dash attack changes were overall probably a good thing. Extra armor is always good, the increased distance it travels is definitely helpful, and the shortened endlag allows for better follow-ups like Superjump into Fair or Dair on floaties or pretty much whatever you want against fast-fallers. This was mentioned already, but boost grabbing has 2 frames of medium armor on startup now. It doesn't seem like much, but I've already found it useful a few times.
Dsmash kills way earlier now, which I think is a decent trade-off for the reduced damage. Makes tech chases at low percents less rewarding, but it's actually a great kill move against floaties. Usmash wasn't really changed enough for me to comment on. I'm really glad they increased the range of Bowser's forward ledgegrab; it makes moves like Marth's Fsmash less effective in basically getting free edgeguards on Bowser.
Now for the more controversial change: Fortress Hogging. Overall, I can't say I'm a huge fan of the change. Fortress Hogging felt really natural in 3.02, especially since you could run at the ledge and let that momentum carry you offstage. Once I get used to the new momentum (or lack thereof) system I'm sure it will be almost as natural as 3.02. One change I noticed that I don't think has been discussed yet also concerns FHing. In 3.02, FHing while your opponent was near the ledge would suck them into your upB and do about 5% damage before you grabbed ledge. In 3.5, it seems like doing the same thing will actually hit them with the strong hit of upB (about 10% damage), then link into the weak hits before grabbing ledge. I've only done this a couple times, so I'll have to experiment some more but it seems like a slight buff to his damage.
Finally, I can't believe they got rid of Bowser's frame-perfect ledgedrop into immediate downB ledgestall. It was my favorite thing to do between stocks in friendlies, and I only SD'ed doing it about 90% of the time. Jokes aside, 3.5 Bowser is good. Perfect wavelands and 6-frame jumpsquat are awesome additions that really help to depolarize a lot of his matchups. I'm still going to use a secondary, though.
