I honestly dont think Browning would either be overawed by game time (his Derby appearances was like a duck to water), or that fans would heap pressure and abuse on him.  Sometimes a manager just has to let a developing player in the team and ind their feet. It has echoes of Barkley all this under Moyes. Maybe not as pronounced, but same principle involved.
Martinez has no excuses if he wants to retain the shape of the team - he brought in McGeady and Atsu and has had Pienaar to choose from until recently. He has experimented though with bizarre formations and team choices and succumbed to using one of the wide places to include players he doesn't have the courage to tell to sit on the bench. Of course Mirallas' return will force him to make a decision, but we shouldn't be waiting on that. He should be bold but he's lacking in that.