"theyre moving away from open source code for their fixes"
For anyone who cares about Bitcoin (and OSS in general), this should be enough to write off BU completely.
If we wanted a centralized, closed-source system, we'd be using banks.
It gets worse. They are claiming not to violate LGPL, that source will be available later - in the case of this "hotfix" the source was leaked by someone in a very incompetent manner. However, given the lack of competence, I think it will just be a matter of time before they violate this again. Its obvious adherence to open source is not their primary concern.