With AR not depending on BST many people are running characters like B!Veronica and such which are a pain to deal, the easiest way to fix that would be introducing BST but that would kill the mode.
Here's my solution introduce a penality system, have a list of character that gives a malus that decreases the amount of lift you get (or increases the lift you loose in case of def) but only if you use certain characters, like:
10 if you have 1
25 if you have 2
50 if you have 3
80 of you have 4
The list of character that in my opinion should give a penality are: B!Veronica, Reinhardt, B!Lyn and Surtr.
This should also include a list of character that have a "lower weight penality", essentially those character gives a penality only if you use character from that list, and dancers could be considered as such. For example just having Olivia on the team doesn't give any penality but if you have both Olivia and B!Veronica then you'll have 2 character that give penality.
Those list doesn't stay the same all the time, they could remove or add someone based on how things are going.
What do you think about my idea?