Sooner or later he needs to be dropped back alongside McCarthy and get a proper #10 in. He has been brilliant this season at just getting it and moving the ball on but the last 15 minutes were the overly eager Ross from last season who tried too much on his own and it was pretty much because by then he was our only attacking option who was impacting the game positively. Mirallas was anonymous, Kone was tired and Naismith got himself about but has no quality with the ball.
Throw in the fact that Barry as most have felt for a while now doesn't even contribute enough in big games as the holding man as he tends to be the problem more than the solution, aside from the southampton game i can't remember the last time Barry had a genuinely good match for the full 90 minutes. Also needs to be considered the few times we have had to play Barkley deeper the games have been so much more exciting, fast paced and attacking. The 3-3 with Liverpool, the 3-1 against QPR, the comeback against Barnsley the other day were him and Deulofeu made it look like we had a whole new XI in the 2nd half.
I also think he would get the best out of McCarthy again who the last few games has looked awful and its because our pressing game has gone, we are having to sit off teams to keep shape, if you compare the McCarthy from RMs 1st season to the current one there is no harrassing the ball, no perfect timed important tackles, the "duracell bunny" engine has vanished and its also preventing us to be able to really throw our FBs forward like we did.
Literally our whole system could be built around Barkley and with the options available in the squad if required and he found form you could then consider Barry but even then i personally believe Besic could play the role similarly to Barkley from deep but with a bit less attacking ability but great defensive cover in the games that its required.
So in conclusion, better attacking play, quicker flowing football instead of sideways and backwards passing catering to Barry in midfield, legs capable of playing a pressing game and probably would suit RMs football philosophy more than Barry does (2 seasons ago Barry was ideal the last season and a bit he's just taking up a position from another squad player) as age has caught up with him far too much. I feel like the Martinez from his 1st season would have considered something like this if he had, had the Barkley we have now 2 years ago because he was fearless in how he got us playing, now though he seems tentative and has lost his early approach so i don't doubt for a second that we will have to put up with Gareth "Plant Pot" Barry until his contract runs down.