A couple years ago I would give this a big no no. But now, after playing some Baldur's Gate, Icewind Dale, NwN, Fable, yadda yadda, I must say that would be interesting. I mean, both genres have things I like and I came to the conclusion that a game that could merge the best traits of the genres (so the sandbox-ness of WRPGs and character and story focus of JRPGS) would be thrilling. So far, the two games that came closest to this are Planescape: Torment and Final Fantasy XII, and those two are among my favorite games of all time. So, ultimately, I think it would be an intriguing experiment that might pay off.