Big Fire Emblem fan so I was stoked to see this mod as an option. Subscribed on the workshop to DL it and add it to the collection. Started the game and checked the mod list to confirm recognition. Mod was listed. Checked individual soldiers to see what their relationship levels looked like after two missions and realized that there was no button to click as the "update" had mentioned - even checked the screenshots to make sure I was looking in the right place. Also looked at the squad line up before launching the next mission and there was no mention of the squad's cohesion.

Here's a list of my current mods:
Muton Centurion Alien Pack
Hidden Potential
Max Squad Size Fix
CapnBub's Access. Pack
Squad Cohesion
Quiet Bradford
Engineers2Scientist

No performance issues so far. it's almost as if the game knows that it's there but is simply ignoring it.