While BST is certainly popular every current endgame event can be done without BST and in similar (or better) clear times. I don't think there's a problem with BST so much as that the first people to figure out mechanics happen to really like BST. As far as BST and LS events, I understand your dilemma. My LS has a rule that we simply won't play with BST. You can level it on your own time but you may never bring it to LS event. Has worked well for us.