the worst thing about melee 2.0 is it would balance the game more and make the lower tiers more useable.
imo the most broken things in the game are fox/falcos shine, peachs Up+B (and the ability to reopen the umbrealla. the d-smash is worse but she needs it), sheiks f-tilt, marths range/disjointed...ness, jiggs bair priority and IC's grabs.
The worst things in the game are falcons recovery, falcos up+b not having flames and by far the worst thing is ganons fair getting nerfed!
EDIT: just gonna assume tc's and pros convo above this post is a waste of space