There's not been a huge amount wrong with Theo's work rate! This season he's worked harder than most wingers tracking back, putting in the tackles and so forth. His problem has been his end product which is too inconsistent. I agree with what you're saying about playing a high tempo game (we've only a few left after all and Chelsea have two cups to worry about/tire them out) and closing them down at every opportunity but I wouldn't single out Walcott for criticism at it.
I would opt for the safer option and bring in Benny as the AM and drop Rosicky back and play the Arteta role. I would then bring OXO on in the second half if things need changing. Coqs hasn't featured much this season so i would bring Ramsey on instead. I would play Gervinho on the left over OXO as i'd prefer OXO playing central midifeld due to injuries. Wenger will probably go for a Ramsey in the middle and Benny on the left as it's safer....
Whoops. Ok I would go for OXO in the centre and Gervinho on the left. Though i think Wenger will opt of Gerv in the left and Ramsey in the centre.....
