What if we put BE gains in... mission rewards?
Just a random shower thought I had which kinda seemed like a potential "compromise," if you will, between going back to a constant gain at end of game to "do certain things, get small chunks of BE from mission rewards."
I personally never really focused on missions cause didn't see the rewards as being very... worth my time. And the fact they were "meh" conditions (like having to change icon. I personally hated that condition on top of 5 man premades. Though, I think that's popular opinion.)
If they ironed out the issues with missions, gave a daily 5-10 missions that gave some amount of BE, say, 100-200 daily total max, and had simple and engaging conditions to em, then I think that would suffice.