hi
Although this is the wrong place for my particular problem(which is solved by removing some packages), I think it's the right place to mention this here to avoid such things in the future. It will reach the relevant people here.
I had M4rina D4rk installed which has theme-customizer as a dependency (is this really necessary?). Theme-customizer has cssu-transitions-tuner as a dependency. This led to a lot of problems as it removed modified-hildon-desktop (I think) and the phone reacted very strange and slow.
Although I am sure I'll try/use the CSSU sooner or later, I right now don't have the time for this, as it seems to be too unstable for normal use.
I think it would be better to separate other apps from the CSSU as much as possible, so they can be used with a different arrangement.
Apps shouldn't be tied to other apps if not really necessary.
Sorry if this was mentioned earlier.