I've not looked thoroughly at all the position changes but just from a few players I've seen so far there have been some good ones and ones that make cards a lot less usable. Here's my opinion on some, feel free to add any yourself! And apologies if I'm wrong on any changes!
Mbappe ST >RW (great as both)
Mata CAM> RM
Lars Bender CDM>RB
Asensio CAM>LW (still looks great but think would be better suited to CAM)