My lv4 GG drachorn tells me I need to advance a mindpower to max it; otherwise it would have maxed in 10 days. I'm mp5. And the current mp5s get to keep their GGs?
Max trees barred from mp4? wut? I maxed myself a tree very early in mp4, and 2 more soon afterward. In fact, I maxed every publicly available creature in mp4, except for angiens which were 1 level from max.
I like the restriction in principle, but the specific choices are a bit too restricting. This is really limiting the beauty of the combat scene in mp4, and I see no reason for anything to require mp6 to upgrade, except maybe morphs. But I don't know the stats of a morph, so I don't have an opinion on them.
IMHO, the restrictions should be thus:
Barred from mp3: angiens above lv3, drachs above lv3, birds above lv4, dark archers & bloodpacts above lv4, elementals above lv5, grasans above lv2, trees above lv3, water beings above lv5, knators above lv3, LR archers above lv3
Barred from mp4: angiens above lv5, drachs above lv4, bloodpacts above lv4
Barred from mp5: none