In the end it's all about practice, practice, practice. No matter what quad you buy. That's how you get "so good that it start[s] limiting what they can do," as you say.
Unfortunately, too many people (me included ) buy and build too many quads, and end up not doing enough of the flying part. IMO, whether they start with an Indy FPV or a Torrent is secondary. How much they actually practice their flying will have a much bigger impact on their progress than their choice of quad.
PS: Of course, choice of quad does have an impact on how often people can fly. With an Indy FPV, you can practice inside your home all winter. For somebody lucky to have a nice yard in sunny California, I think they might as well go straight to the brushless Torrent (starting on 2S).