I also like the possibility of Yedlin for the same reasons, Bath, but it would also resolve the issue of Martin playing at CB and allow Whittaker to cover at LB if needed. Yedlin has 16 senior caps for the USA, which is good for a 21 year-old and he can also play as a WB or LW. In this case a loan makes sense.
Another left-sided CB to compete with Bassong would be good, letting Miquel get more experience on loan (assuming Turner leaves or is loaned out). I'd like to see Mulumbu competing with Tettey at DM (probably at the expense of O'Neil), but I'm less concerned about a LW because I think BJ will play on the left most of the time and Dorrans and Andreu can also play there. AM would still be my main priority though.