Why should Sonic, ZSS, and Falcon be shafted like that? Why is Sonic only at 50% (a whole 25% less than Falcon, who is not that much slower than him groundspeed wise in the first place)? What makes Zamus so broken that we need to nerf her Physics?
What makes Falco deserve that 2% (how much does that even accomplish)? And Ganon? Do they play better with it? If so, why is it okay for them to get additional buffs (especially Falco who is not a terrible character), but not the above 3?
I can sort of understand the need to buff Ganon, but we should be buffing his moveset not his physics (unless we plan on optimizing momentum for every character, because anything else would be unfair IMO). Likewise, I don't think we should be using physics to nerf characters (or in this case, control how much they get buffed), because you are essentially changing their overall gameplay (or in this case, potential gameplay) by limiting their options. If we need to do nerfs after this, we can talk about nerfs to the characters' movesets (and maybe weight or something), not the physics that their entire game will come to revolve upon. Sonic and Falcon will thoroughly expand around the momentum code, because that is simply the nature of fast characters (to revolve around things that make you move fast). Limiting their potential early on is just going to stifle their metagame potential.
/rant