I really recommend BB to put more responsibility into the hands of managers, who play this game. BB is already an excellent game, I just feel that much more is possible and especialy more experienced players would enjoy to have some more influence on the outcome of a game. Right now it seems like tactics play the least important role in this game.
if your suggestion gets implemented, tactics becomes even less usefull because you can not adjust defense anymore to the opposing offense ;)
But that's not correct... How do you know now, if your opponent changes his offensive tactics for the game against you or not? And again: if you don't like the idea, you can just keep your defense and offense like it is for all 4 quarters.
As I said I feel a little limited as a manager because of the few options I have to modify the tactics. In the end, it's still the better team which wins: If your team defends in general better than the opponent and makes more points in the offense it wins.
Right now you supposed to find one offensive and defensive tactic your team can play with best. It would be more fun to see managers switch their tactics more often by giving it more impact to the game.
Correct me if I'm wrong, but cleverness in tactics play today a minor role. It's first the skills of the players and then the enthusiasm you build upon (which i think is too overrated in this game, see also the discussion about TIE).