Completed majority of mm7 quests, in mm6 cleaned almost all dungeons and quests, haven't touched mm8 quests/dungeons yet. Still interested in finishing all three games.
People complaining about uneven difficulty scaling and stuff, but hear me out.
I played mm6, mm7 and mm8 several years ago and there some things I remember from original games:
1) MM6 - majority of spells is useless, enemies resistant to everything except psychical/energy (sequels had tough enemies too, but at least they had a working wide array of resistances, rather than "magic resistance" that automatically transmutes 99% spells into garbage). Maybe I am exaggerating right now, but this how I felt while playing original.
2) MM7 - "Ah, I am really exited to use these grandmaster spells now...wait, what do you mean this is last location where I can use it?" Game feels much smaller than previous, not much room for playing around with all wide array of skills/spells that this game has to offer. In my first walkthrough, I have done big chunk of content before even gaining access to light magic. And gatekeeping skills behind main quest does not help.
3) MM8 - better balanced spellbook, but you are restricted to make only one character and hire created by devs companions (without mods). I am not big fan of this approach at all, so I installed mod on creating your own party(when played first time), but still. Races as classes are cool and all, but it would be cool if mm6-7 classes were in game.
Yes, mod is unbalanced, but at least it solves problems mentioned above( well maybe partially in mm7 content), at least for me.
As
Grampy_Bone said, it would be better if masters would be separated from grandmasters (though I don't think that all gms should live in remote locations, their locations should be logical and no GM of identification items would want to live in some shithole)
And ability to equip blaster as missile weapon is awesome idea.
Now, about global problems:
When I started to playing, my original plan was to play mm6-mm7-mm8 in chronological order, like band of immortal murderhobos, which kicks ass through centuries (Or how much years passed between games? I don't remember) But after playing it for some time, I realized that in the end, this mod is basically three games stitched together and requires player to hope around, even if you don't need mm7 class promotions, because if you manage to handle mm6 endgame - nobody will be able to stop you in other games. Basically, IMO this mod is three games stitched together and every one of them has end game that makes starting content of other games to fall apart. To achieve an experience that I imagined (when started playing) there should be more thorough redesign of locations and monster placement in world with fixed starting point in one of the games. And some quests should be added on all continents, particularly class promotions.
However this mod do achieve some pretty impressive things, even if it's flawed.