Mignolet has been linked with Arsenal.
But he told the Shields Gazette: "Of course, when a new manager comes in, there's new things around and since he's come in, all the games we've played - apart from the Aston Villa game - there were positives. So that's good for the future.
"During the season, you don't really think about how things are going because you still have a lot to fight for, even if that's avoiding relegation. But now the season is over, you can make a judgement on how well we've played and how bad we've played.
"Now is a time to look back over the season and for everyone to look in the mirror to see what they can do better for next season."