Been playing with this mod for some time now, and I must say this is fantastic. There are a couple issues I found that I don't think we're mentioned yet(homebrew Wii ver.)
For some reason there is only char. menu lag when an added menu song plays ( legacy xp or pm themes). With on disc music, there is almost no lag at all.
With the "link is slow" thing, I believe they referred to moves like his dash grapple. This affects all 3 links, and for some odd reason the emerald costumes don't have those drastic endlags. The guys having that issue can use that to play normally for now.
The odd map still soft freezes like in xp. One I keep getting is Z alt smash4 final destination. Could just be my system though.
And for a couple nitpicky ones I've noticed, which don't really affect gameplay. They're probably not the highest priority, but I'll mention them anyway.
A few issues with invisible projectiles or incorrect particles with new characters and what seems like their clones (wolf[Neu.B] vs metal sonic[air spins, A/B])
Many characters retain some voices with emerald costumes(ie bowser down taunt)
The single ice climber only comes in the stock colour if the spetsnaz ver. is chosen
In training mode, emerald characters have shaded icons like the metal char.s from classic, while in multiplayer they don't change.
I don't know whether it was intended or not, but emerald metal sonic is grey. I'd like that to stay though, it looks kinda cool.
This mod is awesome regardless of a few glitches here and there. Keep up the great work.
Edit: missed one. Some maps have weird surface physics, as if the platform ends part way (ie. side dodges get stuck before the edge). The only one I'm concerned with is the central platform in norfair from brawl, as it is a stock map.