What is the point of so many useless abilities making doctrines redundant?
Everything you talked about earlier have actually been useful in my 2v2 lately. My new strat involves 0 heavy armour and I always go for Panzer IV regardless of the enemy I fight against. All of my doctrines for 2v2 have no Tiger. Because of that, all abilities are reasonable for me.
Tactical Movement - I use it for doing a 'blitzkrieg' where I just rush through and let my teammate cover the flank.
Camouflage - For HMG42 or G43 grenadier. If done right, it can hurt the enemy a lot.
G43 - Very useful. Hurts USF riflemen a lot and can be used to wipe them out rapidly.
Artillery Field Officer - When helping out your teammate on his side, a single officer can be enough help
Relief Infantry - I use it when I blitzkrieg into enemy territory so that I can reclaim more AT gun as needed from the enemy.