My knowledge of players is not what it used to be but the types of players I can certainly have a stab at. For me we need an experienced centre back, preferably one who is comfortable on the left. As good as Long has looked in pre-season he's got plenty to learn and having an experienced old head around would do wonders for him. Right back needs to be pacey with a good cross but someone who is happy to start as second choice and challenge any drop in form from Darikwa. A loan player might fill that spot.( Not a title winning squad yet)
As a matter of interest, who would we need that we don't have to make us a title winning squad, given we are expecting more in.
Centre mid you are probably looking for someone similar to the right back. You want a hard tackling midfielder who will challenge any drop in form from those ahead of him - again a loanee could fill that mould.
We also have to consider what opportunities we afford to the youngsters, we don't want to be reliant on them as we were last season but we're going to see benefit this season for having done so. We saw last season how Aasgaard and Robinson came on in leaps and bounds after getting game time. The likes of Lloyd at RB, Long at CB and perhaps Scott Smith in midfield (plus this Pinnington lad perhaps?) will probably benefit equally from opportunities.