I think the interface and amount of "hidden" controls is supremely intimidating. I'm also missing the concept of regions in Logic; I have this feeling of unease that my midi data is not contained in a container, and it could disperse into the wind at a wrong keystroke.
Also, I've run into stuff like trying to move audio "soundbites" to the cursor's position, it's a right click affair in Logic, but I can't seem to find the answer for that in the manual, so I've posted in forums for help.
The thing that really blew my head was the midi editing tools. Damn, they are good! I can for example resculpt velocity data on a per note basis, or I can draw a curve, and depending on the setting, the velocity data will snap to the curve, be scaled by it, be added to it etc.
Similarly for other kinds of midi CCs (or even tempo!!!), I just drew in the curve.
I still need to figure out automation for plugins.
Overall though, I can see lots of promise and would really like to make this my primary daw.