I personally love the crossbar, but what it could use is a third set of 8 (L2+R2) as at 50 with some classes it would be great to not have to switch cross bars to access skills you use on a regular basis. If I recall correct they will be adding in the future, just was not ready for launch.

As I recently switched from PS3 to PC I tied to use the keyboard (what I have used for every other MMO) and it was just strange and hard to get used to. I have started to use my ps3 controller on PC and enjoy everything again.

Point is, if you learn a game on one setup and switch to another it will be much harder to use the new system, but in time you can adjust. the best thing to do would be to level a new class on the new system to get used to it and adjust slowly (as you get more skills as you level) and then adjust for your level 50's.