I don't know about Mujeeb , I never felt loving him so much that I need to find out what was acceptable or not. The bottom line is Mujeeb asked for Indian help break my county and he got it. Now, ask me if I give a shit about if he was a traitor, patriotic or what. He was instrumental breaking my country.
The other aspect of this whole saga was that this was a never win situation. The united Pakistan was hard to keep. There was no land lock among two parts, and they were thousands of miles apart. Very impractical state and very difficult to defend since the enemy, India was right next door and in between east and west Pakistan. So, I think sooner or later, the conclusion would have been the same. Two separate cultures, two different nations and not much in common. However, Hindus have lot of common ground between them and Bengalis. They both can go and screw each other.