I think the real problem here is Nikon's history of artificially crippling their offerings so that they don't compete with more expensive cameras. There was no reason to exclude a 1/8000 shutter, reduce the FPS, offer a crippling buffer size or offer a slow flash sync speed other than to protect sales of the D4s and the D810(If anything the D750 needs the 1/8000 shutter more than the D810). This was supposed to be the new D700, but it's more like what the D610 should have been. They certainly have the right to play this game, but they can't expect everyone to be happy about it.
It's not a perfect camera, but for the money I think Nikon did a pretty good job and for the most part they hit the sweet spot for a lot of users.