Hi!
The interfaces on the older VST instruments are awful. So, maybe change them a little? Prologue, Mystic and … what was the other? They 3 look the same. Also, they barely have any useful presets.
And please, fix the bugs. Sometimes they start acting up. The level goes up (not the volume knob, nor the track level, but the instrument starts outputting an excessive level). Other times the presets wont save. I have to reload a preset when reopening the project. Or they simply stop working and I have to reload the whole instrument everytime I open the project.
If they’re going to be useless (as they almost are right now), just eliminate them from the installation package, like you did with groove agent one. Thats always an option. 
Thanks!