People would know the exact time that a respawn is about to happen and would wait that little while longer to get the spawn. As it stands at the moment, it removes that sense of a guarantee and while some may still wait - the vast majority get on with the match at hand.
This thread was added on May 26, 2019, with posts from T0TALfps.
Original Post
https://www.reddit.com/r/BattlefieldV/comments/btciui/why_doesnt_dice_put_a_timer_beside_the_vehicle/