To me this is a more complicated question than is being entertained here. You do not have a choice for "depends". Setting the adult diapers aside, then we move into how it effects the balance of the piece, what the use is going to be and whether you are also going to count ejector rod shrouds and leave the possibility for full naked rods (porn reference unintended) a la early Colts to enter the mix.
Mostly I do not like poorly balanced revolvers so the full underlugs that result in noticeably front heavy revolvers will need a MAJOR power factor to justify by reducing muzzle flip. Even then I won't feel good about them. At the same time I liked my 6" 686 with the full lug and how it really didn't seem to disturb balance too much. On a K frame (Mod 19) it would be completely out of place and repugnant. On my Dan Wesson 15-2 VH barrel it works not because of balance but because of my habit of shooting very hot heavy bullet loads.
I love the old Colts but naked ejector rods are not part of why I do. Especially for an arm that is contemplated for combat or defense use, I can get a bit paranoid about bent rods.
So...like I said, depends.
P.S. Nice 586 Bob! We seem to agree on that model at least.