Fallen apart or regressed to who they actually are? In fairness, losing Phelia for a while and Brown being benched for disciplinary reasons didn't help, but this isn't surprising to me for a few reasons.
They're a team that are prone to turnovers from pressure. Problem has been there for years, even when Hillmon was on the roster. Their lack of a real point guard has been an issue.
Another challenge has been bench points. They don't get much which doesn't help when their starters are struggling.
They were projected to finish fifth in the conference if memory serves correct. They're in range with what was predicted during the pre-season.