My son is 15. Played Aa past few years now off to high school hockey. He’s been doing some summer hockey and we recently tried a new blade profile. He’s had a 9-10 for some time . We kept the 9-10 and just added a +2 forward lean. He says he feel like he’s on his toes instead of balls of feet and that he falls out of turns now. He’s a good skater , coached for a few years. Is this a break in period or what should we do ? He wants to give up on it. I think it will help with acceleration