I agree with the majority of your comments.
Definitely need a new manager, Dino has done nothing to make me think he is the man to take us forward.
Try to get Piergianni permanent (seems surplus to requirements at Salford), he has really impressed me since his arrival.
Smith would be great, but I doubt we could get him for nowt, so that might be a none starter.
Dearnley was certainly looking good prior to his injury so I would keep him.
Wheater, I'd keep to play alongside Piergianni in the centre of defence.
Rowe has looked a definite improvement on what we already have up front since he arrived.
McCann, I would keep.
Maouche, Missilou, Nepo and Sylla are all very capable at League 2 level, but I'm not convinced they are good enough between them to have us challenging for promotion.
I would be looking for improvements if they can be found probably via loans.
We certainly need to keep the better players in the current squad, but need significant improvements on the poorer players in order to sustain a promotion challenge.
Most of all I'd take a new owner who has some money and the best interests of the club at heart, and is mentally stable.