Before the patch, if one was close enough to revive a player an indicator would appear, like for interacting with objects (although it was buggy).
I have not seen the indicator after the patch, which makes it hard to know when it is possible to revive someone.
It seems to me that since they could not fix the detection bug of when one is close enough, or in the right position, to revive a player, EA just removed the indicator. The bug is still there, but not visible.
Now it is the worse of both worlds. At least before I knew when revive would work, now one has to waste time and risk getting shot trying to find out whether it works or not.