I didn't know about a lot of those changes. Mostly because I didn't bother looking for them, since the website says his regular moves function exactly the same way they did in Melee.
It does explain why certain things, like his Ftilt and Dtilt, felt different when going back to Melee. I didn't really notice both kicks landing on Nair, though, since I usually only use Nair to get the first kick in and bump them up onto a platform. I hadn't tried ledgehopping Fair in this game, I just assumed it didn't work. I'm going to have to give it a go now. I know in Melee it always looked like it was going to work, but didn't. I also didn't know the thing about the dash attack, since I know the DACUS range well enough that I always use that instead, or do a run cancel jab. I thought the bigger reach on Fair was just a mind trick because of the purple floaty stuff that he didn't have in Melee, making the entire hitbox visible. And yeah, going off the edge with sideB is really good. I think it's the only aspect of it that's better than his Melee sideB, though. In Melee you were always guaranteed some form of aerial after a successful sideB, but here there's no such guarantee.
Ganon seems to compete very well. Going off the changes listed on the website, he should still be mid tier. Going off the changes you've listed, he should be high tier (and that aerial sideB is so good. I need to use it more often, because it's always insane whenever I do) and definitely better than CF for people that like the Ganon playstyle.
Ganon's sideB is useful for recovery, but if the opponent is decent at edgeguarding they'll be waiting for you to reveal whether you'll use a sideB or upB, and then edgeguard based off of that. On the good side, if they mess up the edgeguard, you can get a suicide out of it.
I'm going to go try that Uthrow out right away. I always thought the Falco CG was a lot of fun in Melee, but it's really really tough at lower percents. A better Uthrow would help a lot with that.