Here is a list of issues people are concerned with
1. There is no prone in the game
2. No console to input commands
3. They are using software only 16bit sound while consolers use 32 bit sound
4. No use of PBBans streaming (although this is currently being looked at by Dice, I am not sure of the final verdict)
5. No Battle recorder (not sure how much of big deal that is)
6. No recon (again not sure how much of big deal that is)
7. No modding tools.