I didn't say Xhaka is essential, I said Arteta seems to find him essential right now, at this early stage of us learning to play effective football again. Assuming we aren't buying Arteta's ideal 11 this month (and probably won't be buying anyone at all, given all the talk of loan deals) we have to make the very best use of what we have. Xhaka may not be a world beater, but he's improved in the last few weeks and is doing a job for now. Doesn't mean we can't get someone better when the chance arrives (if ever), but also doesn't mean we should cut our noses off.