1-If you lose a unit by standing on cover, that's your fault. You are the one who choose how they want your troops to stand by.
not when a squad decide to occupy 2 ft of real estate on a 20ft wall and an aoe weapon hits. 50% reduction doesn't mean a thing in both of the very real possibilities of taking previous damage and suffering crits.
2-Squad spacing on the move is crap on several squads. Period. THIS needs fixing.
2.1-Squad moving around during mid-late game crossing through yellow cover generated by explosion needs fixing
so there are 3 things (at least) and it's apparently difficult to a. suss out what the cause is, and b. determine which of these is affecting others.