You're getting closer, Felix.
There's still a bit of lag on the roll but in general the gimbal is doing a good job. It takes out the big spikes which would make the video useless otherwise. It also fights slow wobbles pretty well but fails on faster shakes - simply too slow.
If you'd get rid of the jello you could already get good results with a bit of post processing.
A faster servo will reward you with better basic video material even in windy situations where you need to fight fast shakes.