I read the rest of your post about your 'history' with other gym. We were in similar situation because we left our 1st gym which was 1/2 mile from home, and they pretty much blackballed us even though my kids were only 3 and 7 at the time. With that said, to spend 2 years at a so-so gym is not a bad thing as long as 1) your DD is happy and 2) the safety concerns (vault) are addressed and 3) your expectations are realistic as far as skill and progress. We have also done this (2nd gym, ended up staying over 7 years). However, at any point where your child is not happy, not safe, not progressing... AND she loves the sport enough to warrant a change, then it's time to move on! (My girls are now at 2 different gyms each 15-20 mins away in opposite directions, good thing big DD only goes 1x/wk now!)
Thanks for the advice