I can see quite a few being released in the summer. Maybe we just have to accept that the current crop, haven't progressed. You can't expect there to be a Bale, Ox, Shaw or even JWP every season.
If you did then surely other clubs would be producing a youth player a season into their first team, but they aren't.
Our expectations are high, maybe we just have accept that the next one might not come along for a couple of years.