When searching for Dhatuu Dil as part of the investigation, the game says you can only deploy 8, but it lets me deploy 16. Despite my best efforts to build up an epic team, I only have 12.
Personally I think 16 is a great number, what's the point of recruiting an epic team if you can only use 6-8 at a time, but I digress. Thought I'd report it as a bug anyway.
Thanks for the report, this is now fixed for the next update!