disclaimer: I have a loathing for wing backs that are caught out of position and overlap needlessly but imo...
Carl Jenkinson is a much better RB than Bellerin, it's really not even close tbh.
Debuchy was a poor transfer for what we parted with, even though he's up to standard for now, but given his contrasting style with Jenkinson(whereas Bellerin is just a **** version of Debuchy) I think we'd be mad not to take Carl back as 2nd choice next season and send Bellerin on loan somewhere.
I promise you will get big match performances and intensity out of a lad like Jenko that will be worth perhaps an occasional clumsiness on the ball and every challenging team needs English defenders imo. Alternatively given his age and Englishness we should be taking £12m at least from WHU when you think about what we paid for Chambers or what Shaw, Bertrand etc have gone for.