Unfortunately, Sonic was poorly designed even in the old game, and has aged poorly against the changes since. I love the buffs when I'm teamed with a Ringer, but I can't stand to play one, despite multiple attempts solo, on teams, and various ATs, including MMs.
The debuff toggle is a PITA to keep up, it turns off constantly and is expensive for what it does compared to say, Tar Patch.
The bubble needs Sleep protection. Since it offers no defense, you get hit for everything, unlike Force Field.
Liquify, as mentioned is an a punitively long recharge.