A few days ago I installed that submod on my computer and it is really great. The map is much more lore-accurate, there are many interesting events, some factions have been changed, some added... However I am talking about hotseating now and MOS has another great archievement which is more balanced AR (definitely for Mordor/Gondor) so I am sure that this also counts for all other factions.
I would like to try one hotseat using this submod with only 4 or 5 factions and players that are experienced and reliable in my opinion. If you are interested of course, I propose that we concentrate either on Gondor - Mordor scenario with Rohan and Isengard-Dunland/Harad or northern scenario either in Eriador or Rhovannion since the map is bigger and it would be better to concentrate on one part of Middle Earth.
The players I would like to see here are joerock22, Chieftain Khuzaymah, JWANT, maybe Panda and myself while knight of meh can become admin. However before we can be talking about details of such hotseat I would like to hear if you have any interest to join.