I already stated it on other post, and i'll repeat it here. I'm all in for "ludus free" cohorts.
I happen to be somewhat tired of being constrained to select minis from one faction alone, not being able to play what i like from other factions (I miss so much my ariadna camos when playing Imperial Service...). So I do love the idea i can mix my Tiet-Khebi with Micon and Frigge, for example. The painting of my minis show this up, and in general there are no "faction colors" between them. Mind you, most morituri wear white, but I painted Toth in black trimmed red. That way i reinforce the idea "anyone can couple with anyone".
Plus, having a cohort without Proximo or Acerbus, or any other beast/titan? No way!
PS: I know, there are no photos of my minis around, but you can have a look at them at
http://www.diariodelsegundo.blogspot.com Warning! It's in spanish Someday I'll upload them here too.