That’s a good idea, a rover, now that the fly-by has yielded so much new information, a rover is at least feasible, it’ll be a long, long time before it gets there though, I’m afraid. The probe was on, then off, then on, then off, then back on, and different proposals were approved, then rejected, etc; timing was crucial because the received opinion at the time was that the atmosphere was going to freeze.
The way things are with NASA these days, I won’t hold my breath on a rover sent by them. Maybe the ESA will attempt it though. I don’t know how things stand with that agency these days regarding putting money into these ventures. But even if someone does send one, I doubt I’ll live long enough to see the results. I’m no spring chicken any more. Dang the luck.