OctoSquad (8 merc squads)
Increases maximum squad size to 8 and makes small UI changes to fit things in. Works with 1.5 with new games and existing Saves.
Thanks to modders Tobias and SkunkXL whose mods I checked out and learnt from.
Note. If you are using another mod that changes squad size eg. Custom Settings, this mod will NOT override that setting, it will tweak the UI only.