Skills
The new addition uses the same general system for skills. The difference is that there are fewer skills. Each skill tends to have a wider variety of actions for which it can be used.
I have no problem with the new system. But I had no problem with the old system either. Did it need to be changed? Once again, the same theme arises. At least in this case I give the designers the benefit of the doubt because the skill system was one feature I had often read complaints about.