[olliej]

Why would anyone trust that a future change will be better? or more importantly that Unity won't try to reintroduce this again in the future?

I don't see a path where Unity can meaningfully do anything to regain trust - they've already silently modified license agreements to make any future changes apply to already shipped software. Who would ever want to enter an agreement with such a company? The silent nature of that update stinks of the company trying to get people on to an updated contract that would let them make this change and have it be unavoidable for everyone.