Would there be, or are there any, known complications, with incorporating the Knights Shop, into the leveled list?

It is a mod already, I do not want to blow my game apart by putting it into the mix.

http://www.nexusmods.com/morrowind/mods/43367/?tab=4&&navtag=http%3A%2F%2Fwww.nexusmods.com%2Fmorrowind%2Fajax%2Fcomments%2F%3Fmod_id%3D43367%26page%3D1%26sort%3DDESC%26pid%3D0%26thread_id%3D2347559&pUp=1

As long as you use a levelled list merger (Wrye Mash, tes3cmd or TESTool with Aerlorn's Reseqeuncer) you'll be fine.