Actually, I correct my statement to this. Give the tanks more rewards to cater the majority of the players.

Give me roulette-only acquirable, awesome and exclusive tank glamour, dyeable and unisex. Give me cool looking accessories I can show off.
Give me more tank-exclusive mounts, titles, special role emotes and poses.

If the DPS want faster queues, SE might as well dump the whole box of carrots on us instead one carrot at a time.