I don't see any problems.
The MCA NPC's are varied:
1) Possible Companions ... as Fable noted in an earlier thread; they're disposable
Believe there are 50 scatttered around Vvardenfell ... if you install v5.2, I believe it deletes about 20 ... they can be added back in with a patch
2) Courtesans - located in various taverns
3) Commoners/Nobles - walking around ... basic dialogue options
4) Class Specific NPC's - Mage, Knight, Paladin, Warrior, Champion, Ranger, Archer etc ... located in the towns ... dialogue options limited
5) Regular Enemies - pop up in town and out of town ... you can adjust the number that spawn
6) Uber Enemies - Dremora Warriors, Dremora Marksman, Seducer ... very tough ... might be missing some ? ... they spawn in shrines ... have faced 1-4 per visit; when they spawn
7) Animals - I know you like them
8) Traveling Merchants - sell some "really nice" stuff
I might be missing some NPC's ?
Sorry, don't know what LGNPC is.