To try and calm fears about customs ruining the games balance, a recent customs tournament had a rather unexpected character lineup in the top 3. (According to seagull joe who i talked to at xanadu, forgot to ask him the name of it)
3rd place, Kirby (MikeKirby)
2nd place, Megaman (Ninjalink)
Hey, great right? Generally ignored characters making a strong showing. Oh, but wait.
1st place, Diddy (Jtails)
Good characters and good players who use them are still good characters and good players. So far customs don't seem to change that, they just make more good characters available. I also personally find it refreshing that each of these players are character loyalists, and not explicitly exploiting any sort of perceived cheese.
The only powerspike I fear is Rosalina's shooting star bit.
Falco dropped from top tier basically just because he lost his ridiculous laser. Giving that same ridiculous laser to an ALREADY top tier character...
Probably disgusting.
On a side note, I keep hearing people talk about Shocking cape and Zigzag can, but I can't find out why people think they are good. Can someone explain?
Falco gains some decent movement and zoning options, along with some really annoying edgeguarding ability. (that bair on a character with the ability to go deep is scary)
Shocking cape is liked because mario doesn't have a fast, meaty, high priority fair or other move with range to put out in front of him. Shocking cape enables him to punish air dodges, land, edgeguard, and overall give him kind of a slightly worse but different bair for use in front of him.
At least what I heard from 2fast, Boss, and GIMR.
As for Zigzag, it's just a much more radical and difficult to deal with tool. It doesn't explode on shield or contact, it just hits and keeps going, even comboing into itself.
With regular can, if you try to pressure someone and fail, it hits their shield and the can is gone, anyone with any type of decent dash can close the distance and disallow DHD to get out another can.
Zigzag however, can pressure for free. It can hit a shield, then return. It's also much faster, kills better, does more damage in the long run, combos better, and frame traps for grabs (which btw it enables grab combos)
The only downside is that DHD can't camp behind it very effectively. But instead it forces approaches with huge frame advantages, and damage potential.
A recent discovery was that if you frame trap with it so the can is inside their shield when you grab them, and just mash the can, it will do 20-40% due to the starting hits being so low in their hurtbox. (normally when it hits, it hits high up, disallowing it to hit too often)