Tank LB1-2 is sometimes used in BA when somebody messes up Meteor positioning, such as dropping it in the middle of platform, and the LB is used in an attempt to salvage things, frankly the issue is that Tank LB is just a damage mitigation, even LB3 is just a mit but it's a very large mit and also it looks flashy, so to even use correctly it needs coordination, thus mandatory Tank LB sequences, and even with coordination people would always favor not using it if they can get away with not using it cuz it can then be used for damage, and the biggest damage mitigation in the game is the boss being dead, thus, again, mandatory Tank LB sequences.

The only way to truly fix it would be to make it like PvP and make the LB gauge a personal resource, but that'd mess up every fight that currently has a mandatory Tank LB3 sequence.