The point being missed is Koeman didn't develop the U21s looking to step up. He blocked them from training with the first team, demoralised them by negative statements in the media and ripping into any who messed up when out of necessity were given a chance. Football performance at this level is so dependent on motivation, morale and confidence. Koeman did not motivate youth. Pochettino did and does. If Puel is true to his word and history we will hopefully see better performances from the 18-22 year olds this season at all levels. Then after this season it will be a lot clearer if the young guns are up to it or not because they will hopefully have been given a real chance. Just hope Koeman hasn't done too much damage to their development.