Totally +1!
You forgot the elephant in the room: Swapping mods to a new team (and probably either back to where they came from, or backfill the toons they were taken off from), including researching which mods to actually use: 30 min.
So I remember the early days of HAAT, 4-5 teams, all of them sharing variations on the same few mods = hours on end of looking for mods, useless confirmation buttons, etc.
I can totally see Territory Battles (use your whole roster!) going down that slippery slope (and hopefully I'm wrong!)
On challenges: Just remove them altogether, they serve no purpose anymore.
