Yeah most people end up using warp stabilizer with gimbal footage.
My Ronin M works pretty darn well, but I still use warp stabilizer if I want it completely smooth. If I shoot super wide like 17mm full frame its not an issue though.
Had tons of jitter issues on my beholder S1. The Crane 2 seems a lot better of a one handed gimbal but its probably not perfect.
So in conclusion if you want super smooth footage shoot super wide, like 12mm. or use a stabilized lens or stabilize in post
IBIS of course will pretty much solve that problem though