Your evaluation certainly have merits and a lot of it we confirmed when speaking to clients later. Just one thing to make clear: I have 5+ years of team management/leadership development and I used a similar tool I created and evolved (in paper form) to improve a loooot of teams. So the tool works - BUT you are correct, it is a pain to apply and you probably need consultancy to get out of the team management hole if you are not a skilled manager.