basically, title. now that we are getting new skills and some old skills becoming useful, there is absolutely no need for it. it's a skill basically everyone has in all their tank crews which add 0 variety to the game (one of the reasons WG mentioned in patch news for new skills, or should i say excuse) and it's also the most boring perk. everyone gets it cause everyone should get it. not that it's suitable for a specific tank/role. every single tank, regardless of what they do, has it.
and at least it would help a little bit with the tanks becoming super tanks with 6-7 skill crews. it would also help with f2p folk with 3-4 skill crews. they can get one more useful skill and would reduce the gap with 6 skill crews of others.
it makes just as much sense as removing 6th sense and making it default skill of commanders. i know this is far from the ideal solution for players, but wg will never do the ideal thing for players. at least this should be acceptable even by their standards.
Source: https://www.reddit.com/r/WorldofTanks/comments/12e4qgc/remove_brother_in_arms_from_the_game/