What concerns me is that when you grapple someone, the only ways for them to be freed before the end of their next turn is for you to be incapacitated, or for them to be force moved out of your grapple's range. Other than that, the target is locked down.
This can be a nasty way to lock down a powerful melee force for a couple rounds of combat by using a fairly minor ally. If you're a PC, that may be a summons. If you're a bad guy it could be a CR 1/2 toss in during a high level encounter.
Not being able to break the grapple through trying to escape can lock PCs out of the main combat. It can keep powerful bruisers totally away from the PCs.
I think they really need to reintroduce a way for PCs to sacrifice an attack in order to break a grapple during their turn.