I'll provide a different perspective from Mrs. Puma.
As a parent of a 7 yo L3, I think that for us parents who are relatively newbies to competitive gymnastics, it can be hard to know whether what you're seeing at your gym is potentially a problem, and wondering whether there are better options out there is pretty common.
I considered changing gyms last year. I thought that the gymnast:coach ratio was too high and that my dd wasn't getting enough individual attention. The schedule wasn't great for our family and wasn't going to get better in the next couple of years and I knew that other gyms had schedules that would work better for our family. And there didn't seem to be enough uptraining. I know others in our group had some of the same concerns and yes, girls left for those reasons after the L2 season and switched to other gyms.
At dd's gym, there are different coaches for L3 than for L2, so I figured I would wait to see how things went with the new coaches for L3 before deciding whether to look at other gyms. (And I was busy and tired and not really looking forward to the task of researching new gyms anyway.) I was surprised that the girls who left all left prior to the official move up to L3, so before starting with the new coaches, so their parents had had enough and left.
I've talked to some of the moms who left and they're all pretty happy they switched and they all seem happy with their new gyms. Interestingly, my dd ended up really liking the new coaches, and at least for now, I'm pretty happy dd stayed. Plus what ended up happening is that more girls left than new girls came in, plus some girls are repeating L2 and there were no L3 repeaters, so that all ended up making the gymnast:coach ratio, which was my big concern, better too. Of course, that can always change again, and maybe there will be a huge influx of new girls or a bunch of repeaters for next year. Who knows? But my dd is happy and seems to be progressing. Could she be progressing faster? Maybe. But most kids at our gym do 1 level per year and I think she's on track for that, and the uptraining has also increased in L3, perhaps due to new coaches, so that too seems good. Although she does not have her kip, her coach says she's really, really close (but she's been saying that for 3 months now!), and they're really working them.
I think that some wondering whether there is a better gym out there is normal for a new competitive gym parent, because we just don't know what to expect and to compare it to.