TRM,
I'm kind of in the middle on this one. I have a new PH with the flex stock and forarm. I like the stock but the forarm isn't something that I get all that excited about. Quite frankly, It's just a piece of plastic with some souped up rubber gizmos glued on to it.
So, if you like the current forarm that you have, keep it. If you really want the new style, call T\C and tell 'em you didn't get what you paid for.
I think It's a personal choice.
Dave.