Sadly, and I say this as a 'veteran" of the travel lax circuit, the grass more than likely wont be greener elsewhere--just a different shade....if your daughter has stagnated and the coaching/playing is not teaching her anything new or improving her game, then it is definitely time to seek a new program.
But as our experience has taught us/my daughter, its just more of the same eventually--in a diff color uniform.
The travel machine is basically a cookie-cutter idea that has run its course. If you really look at it, there are fewer programs with more than a team or two at any one age group. My take (and just my take) is that folks don't want to shell out the ever increasing fees to have their daughters spin there collective wheels.