I was thinking if one did do a reedy conversion of a pico ariframe, a really mild prop like a 6-2 would help keep things slow. I agree, the fermosa looks like it would be less apt to snap a wing off, especially if the wings were covered with econocote or similar.
I've read of lots of flyers covering these foam planes with light glass cloth and water-based varnish or normal fiberglass epoxy to make them much more durable. Thing is, that much effort puts you back nearly to the level of building a proper wooden plane..
That's what's great about this rc airplane stuff, there's never one perfect answer to anything.