As a hard core Webley WG fan, I have to applaud to your statement.
As you and others could guess, of course, I am not talking about copying every detail. When talking about ergonomics (grip, hammer, trigger), Webley WG with birdhead grip is IMHO the best, nothing comes close to it. If you ever have a chance to take it in your hand, don't miss opportunity.
Regarding barrel and release mechanism, of course, they have to be designed to suit swing out cylinder system. I would say, Ruger RH, SRH and GP100 are on the top. However, those mechanism are not simple. Second best is Dan Wesson system; simple, rugged, reliable and proven, making DW revolvers so accurate.
Also, S&W Triple lock is another beautiful design. However, it's complex and requires a lot of hand fitting, so no wander last one was made more than hundred years ago. If I am not mistaken, somebody (Numrich!?) was selling triple lock crane about 40 years ago. At least, I had seen add for it. If I am in S&W top management, I would seriously consider making triple lock again. With todays' CNC machines, manufacturing cost should be reasonable. Of course MRSP will go up 25-30%, but I bet those revolver will go like hot cakes! Just no MIM parts in mechanism.