I don't understand the snafu about Unity changing terms over the use of their licensed Unity 3D Engine. The reason why is, if you are a small game company, you are not impacted at all. If you are a large one, the way you protect your business is by purchasing insurances to make sure you are covered when this happens.

So other than yelling for the sake of yelling, I don't see what is so wrong about it.

Oh, and by the way, if you are serious about 3D gaming, you already must have written your own engine and associated tools. So whatever Unity or any of competing engines do is even less of a problem in my opinion.