With everyone fit, I think we've got a potentially pretty solid defence with right back being the one I would look at strengthening before the deadline, though I would like a CB to add depth to the squad. That said I don't mind Bacuna and as it stands I think he should be our first choice RB. I'd like us to improve on him, though I've said it before but right back is his only effective position. Playing further up field he is completely nullified, as it is attacking from RB that gives him space to make an impact, he just doesn't get that space and can't work it for himself in a more attacking position.
If he is RB throughout the season then at least he is likely to create at a least as many goals as he could give away.