The Sky Blues were deducted 10 points earlier this season for going into administration and are also under a transfer embargo.
Pressley, who was appointed manager in March, believes that he needs to work with a smaller squad next season if Coventry are to challenge for promotion.
"When I came in I knew I had six or seven weeks to assess the squad and see what type of players I had to work with," Pressley told Coventry's official website.
"I knew it would be difficult to assess them in a first-team environment but the 10-point deduction has given me that opportunity to assess my options. Of course I wanted us to fight for the playoff places but once the deduction happened, I knew it presented an opportunity.
"Moving forward, I do believe we need to reduce the size of the group. I want a more manageable group, a hungry group. That is a group which can take the club forward and that is what I will be working towards."
Coventry sit 16th in League One with two games of the season remaining.