McCallum for sure. Was comfortably our best LB before he got injured. I agree on Chong too. He's one who would certainly do better in a more counter-attacking side, akin to how we played in the 2nd half at Derby. If we adjust to a playing style closer to that, rather than the more passive, ball-retention based approach we've tended to take in recent years, I think he could do alright.
Not really many in the squad that I think could really push on who aren't already doing so. CB - Tanganga is an average player, McGuinness is very poor at anything besides aerial battles, and he's questionable at that. Seriki is a very competent RB thanks to his pace, but needs another to provide legitimate competition to help him progress.
Matos and Rothwell, I am prepared to see little improvement from them. Neither showered themselves in glory last season, and Rothwell in particular has a track record with Leeds and Rangers.
Bamford is likely going to be carrying the goalscoring responsibility on his own unless we get another good forward in. Campbell seems uninterested now, and Cannon has had more than enough time to show his worth, and it just hasn't come.
Our season is going to live or die based on our efforts in the transfer market. If the incomings provide enough of an improvement, then we could do very well. If not, then I won't be looking too high up the table methinks.