I use Adrenalin rather extensive on heavy armored brothers to compensate their low initiative in critical situations. It saved me a lot of times. Very useful with right fatigue managment.
Fast apaptation is good for achers in duels with enemy snipers (with is pretty tense moment in late game, when you face 5-6 even 7 good shooters agaist you, somethimes with heavy crossbows, this things can pierce good hole even in heaviest of your guys).
Others are more o less useless/weak. Agree.
