Loving the concept behind the mod but finding a few issues with it, significantly increased initial load time (from about 15sec with no mods 1min with a dozen to about 5min with the dozen and this), increased gpu load during game as well. From here I will only be talking IW since they are the reason I picked this up. The research and starting unit changes cause a bit of a slower start due to the increased number of "nessecary" researches in T1 and requirement to build a cult of chaos before getting a 2nd city. Beyond that however it just doesnt really feel very Iron Warrior-esc as much of the research and units are standard CSM, to help with that I have thrown a few suggestions below in the hopes that it might assist.

To allieviate the research heavy T1 bracket you could move warpsmith to T2 and master of possession to t3, or ideally warpsmith to base unlock in lords quarters with chaos lord in t2 and master of possessions in t3. (Keeping all heroes unlockable by the same point as base game just reordered based on how common they tend to be)
To fit IW background a bit more change boons to use the mark system (pay x influence to give a unit the boon, can apply once per turn) and rename to augments and bionics. If this needs further balance change max limit a unit can have (effectively this would allow an IW squad to reliably get boons of specific type, but normal csm could stack all of them).
Similary remove rites and icons other than vengeance (changing it to needing veterans of the long war or boons).
And finally give certain loyalist units and upgrades, eg predators, vindicators, dozer blade, maybe even terminators and basilisk at high tier.