I really think that showing ur doctrines at the start of the game makes it harder to play non meta tactics. Example given: u want to play a banshee rush on eldar cloaking up with scorpians and murdering ur opponents troops. Probably u would want to pick the banshee doctrines. But if u do so ur enemy will scout ur intention in the loading screen. I really think not showing doctrines at the start of the game would encourage non meta play and active scouting, espescially if todays patch makes more strategies viable!