My daughter started to have a noticeable discrepancy in her skills development during her level 9 season. She is extremely strong on vault, beam, and floor but very weak on bars. This summer, the gap appears to be widening while training 10. she was all the necessary skills for 10.0 start value on vault/beam/floor but will struggle to start at 9.5 on bars. Was curious if this is "common" for most gymnasts? are high level bars skills the toughest to develop? (she's a atiny, fast-twitch powerful gymnast with average to below-average flexibility)