There are a few things Unity needs to address (I'm about to go write a couple of games because I've spent a career writing boring business software) before I will consider using Unity:
* One of Unity's spokespersons actually said that Unity could add fees at any time, and customers could not do anything about it. Aside probably being illegal in most jurisdictions, this mentality shows a complete lack of integrity and an abundance of power-drunkenness. What is being done to ensure that you can actually do a contract with Unity and trust them to live up to their obligations? (spirit of the agreement, not letter of the agreement)
* What is going to be done to make sure that Unity's executive team does not make a future mistake like this?
Finally, we'll all have to wait. The tweet said "we heard you and we're going to do something different". Not exactly a decisive move.