Well messed around with it and what do you know. The game broke from all corners of the world. Grass is [censored] up(impossible to remove as it got overwritten by 3-4 different plug-in'less mods and hell knowns what the original files are) and MGE by those settings and all the extra mods baggage took the system to a crawl. So going to start from a clean slate and by other peoples guides.
So a warning to everyone.
Not that I consider myself to be an authority on it by any means, but my most list does have a rather long list of suggestions for using MGE sensibly without crippling your system in the process.
I don't think I explicitly state it (at least not in my commentary for MGE), but yes, I consider any kind of grass mod to be one of the easiest ways to slow your game to a crawl, and thus have never recommended them.