Not a combat expert by any stretch, but ...
... as a person interested in hitting exactly where I want under a variety of lighting conditions, and sometimes doing so in a hurry, there's just one issue ...
Sights, sights, sights. I am a proponent of aimed fire even at close range.
Everything else about the gun, be it auto or revolver, can be overcome, but a lack of good sights will always cause hitting to suffer. Put differently, not being able to see your sights makes you more dependent on LUCK than skill to hit your opponent.
In fact, even just having a Patridge front sight improves my hitting dramatically. If you don't want to take time to aim precisely, you can still dump lotsa lead downrange with a gun having good sights.
Consequently, the other day I sold my last snubby and now carry a 3 3/4" .45, which isn't too different from what you are considering. Snubby sights, unless it's an adjustable, are miserable when you're in a hurry and under speed and stress. They aren't even that great when you're shooting bullseye in broad daylight. I hated even the adjustables, since they still used ramp front sights that washed out for me in certain types of lighting. By contrast, my .45 has big bold Novak's with a post front sight.
Incidentally, my groups with the .45, though it's more difficult to shoot, are MUCH more consistent than when using a too-cramped ramp/shallow-notch, which would give me point-of-impact changes I never experienced with target sights. Musta been the lighting changes.
Don't mean to sound preachy, but this is just the way it is according to MY EXPERIENCE from years of targetry. It's probably worth exactly what you paid for it.