I see (thanks for the link).
Well, I'd say BB is wrong by default since it considers 5 players a roster
But hey, it's their definition/decision to make, so I guess that's that.
I get what you say but that's where the management gets in... in my view, a team/roster should have a few superstars/top players, a solid core and, possibly, a few role/development players. Since there's injuries and (partial and game by game) exhaustion, you can't (or shouldn't) just have the same players playing over and over again, though it is certainly possible. It really depends on how they want things to work.
Yes, there's been a lot of talk about that. I assume some calculations must be made in order to figure out how and if to adjust things, if they think they need to.