Ron,
I agree that the 586 and 686 aren't 'classic' looking Smiths, in the sense of the 27, 28, 29, 19, 15, etc. I'm also aware that they weren't a novel concept, but rather one made to compete head-to-head with Colt's Python (and Ruger's Service Six, sasu).
However, I still argue that, from a practical standpoint, the 5 or 686 is an improvement over previous S&W .357s. Stronger and more durable than the 19/65/66, trimmer than the N frames 357s. More significant to me, the 686 corrected the biggest drawback to the N-frame 357s: the shorter cylinder that did not allow the use of heavier bullets. With my 28, I'm pretty much relegated to bullets no heavier than 158 grains. The longer cylinder on the 686 finally allowed the use of Elmer Keith's Lyman 358429 170 grain bullet in a 357 Mag case, not just 38 specials.
I'll concede that the 'Classic' Smiths balance better in the hand due to the non-full underlugged barrels, and truthfully I prefer non-full underlugs. And yes, they were never pinned and recessed, but they didn't NEED to be. 357 case heads are plenty strong, and I've never shot a threaded barrel loose.
Like I said, from a purely practical, utilitarian standpoint, I still think the L frame 357s are superior, and deserve more attention than they normally get. We seem to be in a bit of a 'revolver renaissance' with guys like Massad Ayoob, John Taffin, Brian Pearce, even Dave Anderson and Clint Smith writing about the virtues of revolvers. All I'm saying is give the Ls their due.