My views on those listed above:
Glover (GK) - Looked a talented keeper at U18 level but struggled when he moved up to the U23s. What he has going for him is height and agility, unfortunately though he's very error-prone - which isn't so much of a problem early on as long as they learn from it but in Glover's case he kept making the same kind of mistakes over and over again, he's also not too great with the ball at his feet. I haven't kept up with him since his loan but I suspect he still has the same issues.
O'Reily (GK) - Was only here for a year, I'm guessing we saw something in him and took a punt but he barely played at all so can only assume he didn't impress, I can't recall watching him myself so couldn't possibly tell you anything about him.
Brown (LB/LCB) - This one is slightly surprising to me as whilst he was never one of the best in his age group, he was still a solid player with decent athleticism and moderate ability on the ball. Maybe what hurt him was being moved between CB and LB whilst never truly nailing down either position. I would expect him to get picked up by a decent club, where he ends up long-term it's hard to say, I don't think he's one we'll regret letting go but he should still have a solid career somewhere.
Tsaroulla (LB) - A sad story with Tsaroulla as I believe he was involved in a car crash during pre-season and he hasn't played again since, apparently he suffered quite severe whiplash and has been having complications as a result. I don't like to speculate but I can only surmise that he's unable to play again as he was easily one of our most impressive U18 players the previous year so I can't see any other reason why he would be released. He's a stocky full-back with decent pace and very good technique, ultimately he may not have made it here but I think he would've been Championship level at least with a good chance of working his way up to the PL - similar to the likes of Adam Smith/Charlie Daniels/Ryan Fredericks. Hopefully what I've said is wrong and he can still have a career but if that's the case then I'd question why we're letting him go.
C.Maghoma (CB) - Tall and powerful but lacked the mobility and ability on the ball to play for us. Is rumoured to have signed for FC Twente in the Dutch 2nd league, I'm not up on the quality of that league but in England I wouldn't have thought he'd go much higher than League 2.
J.Pritchard (CM) - An industrious player with a good engine and ok ability, should make a career for himself in the lower leagues.
Tracey (RW) - Strong, direct and fairly quick but lacks the technique to go with it.
Loft (ST) - Tall and strong but not very mobile, would project him similarly to Tracey in that he might end up in League 2 at a push but more likely lower than that.
Harrison (ST) - A silky player with good touch/technique and ability to finish, his problem has always been a lack of power and presence as a forward. If he can work on that then he should have a good career somewhere. Has the most ridiculous record against Chelsea at youth level, I've plucked 15 in 10 against them out of nowhere but it must be something like that.
Omolabi (DM) - Only saw him a couple of times and other than being big I don't remember much, he left a while ago.
Lock (RB) - Looked a decent enough little player but obviously we felt he wasn't quite good enough to keep on and we have better in his direct position.
Walkes (CB/RB) - A solid player, one who has performed better than my expectations. A move to Portsmouth seems to be a formality and would suit all parties.
Ultimately none to really be concerned about and it's just a case of making room for the next wave. Bennetts is a loss though and we'll see soon enough whether he's the only one to try his luck elsewhere.