I was impressed by Galloway's advanced play vs Arsenal, wasn't it him behind Lukaku when he hit the bar ? Galloway is growing each game and for the time being I'd leave him at LB especially vs Adam Johnson, give him 5 minutes to sort him out and put in his back pocket, the rest of the match he can bomb forward.
Browning has previously shown that he can get forward (vs. Utd @ OT last season when he came on as a sub), just hasn't done so much this year. I think a lot depends on who plays in front of the RB, Lennon gets back well, I doubt that Gerry can tackle.
I'd leave Stones & Mori to continue to build their understanding in central defence, Galloway at LB, start Lennon at RM and play any of Browning / Oviedo / Kenny / Holgate at RB.