First of all this game is outstanding. I play at it like a frenzy shit.
Personally I think that having too much monster diversity will bring a lot of chaos because when you have to handle 22 monsters running at you, the only thing that helps is that at least most of them behave the same manner.
If for somewhat reasons these are 22 different monster my samurai would go straight to hell in a few seconds....so adding monsters is ok, but be careful.
Lets go back to the point, I am a rogue freak, I play a lot ADOM. in ADOM you can in some circumstances have compagnions tha help you. But, I never saw any roguelike putting togehter a player with more than 1 "autonomous" (event with stupid AI like attacking the nearset beast )compagnion. I mean, my samurai feel very lonely..., why not creating senarios like:
Monsters rushing the Ronin Clan (lets say 10 samurais compagnions (why not differents types of samurais ?) batteling at my side to death).
This will a new gameplay type with a lot more complexity and a maybe even a new tactical dimension.
I hope folks there will find this idea interesting.
regards and thx to the dev