You know, why not.
- Be more reasonable about palette swaps. These exist for us to be able to tell apart multiple instances of the same character.
- There are numerous pairs of costumes that don't distinguish easily. Consider the worst case, Sonic: why not just change his fur, instead of the tiny little ornaments he wears? Worked for DK.
- If a character is going to have two dozen costumes, make sure they're all distinguishable. Otherwise no. Prioritise dammit.
- Bring back character-specific Target stages
- Board the Platforms was pretty cool.
- Some Up-B moves had a little 'jump' added to them, for no reason other than the input happens to be Up-B. It usually doesn't fit the move very well, and just turns out a forced way to improve a characters recovery.
- Ability to grab otherwise-grabbable thin platforms with tethers (for example, Olimar on Port Town)
- No duplicate characters. They are annoying and don't make any sense. (Mario/Doc, Link/YL/TL, etc)
- For double points, they could be made into actually distinguishable costume swaps.
- Give back a relative handicap system as in SSB and SSBM, instead of an absolute handicap system like in SSBB.
- Computer players shouldn't prioritise attacking human players.
- Stuff that I haven't thought about yet
- Obvious stuff such as removing tripping