Every now and then, I play HBS BT a bit and it is kinda fun, but the repetetive mission design makes you tire quite quickly... Especially given the rather artificial difficulty of just throwing 2 lances minimum at your one lance. It practically forces you to cheese the AI, abuse aimed headshots with the Marauder and so on.
It's still fun enough, but it could be so much better. If HBS learned from this game and made an improved sequel, it could be really amazing, but afaik, they already said they wouldn't revisit BT anytime soon.