As someone who only Plays top tier air and ground (mostly ground) with several nation at top tier, yes I like top tier.
The only reason that I like top tier is because of the vehicles.
But yes top tier maps design are awful, maps size are too small, gamemodes are bleak, yes there is a lot of bugs and imbalance, yes the grind is painfully long and Yes low level with top tier premium are ruining games.
Still like top tier. Hoping for Gaijin to improve it.
Maybe new Aerial Warfare mode and WWM will help ?
Until then I find even more fun in top tier simulator battles.