[renowner]

Doriad's vine move immobilization: It already has a 3 round cooldown.
Seed sniper: Currently has a bug, or just really poorly thought out application system where if the enemy just skips, it removes the immobilization.

Give quicksand a cooldown and i doubt you'd see much problem with it.
At least in the past, i'm not sure if this is still the case, but stuff like crane hop and bunny hop and a few other movement skills still strangely worked in immobilize. Blink works of course. Immobilize also doesn't lower your evade to 0 like frozen does.