my shitty jacket doesn't have wrist gaiters or thumb loops. In powder, snow gets in my gloves if I wear them under. I agree, though, gauntlets over the sleeve look really dorky, but it works better for me in pow, so that's what I do....but only in pow
Wrist gaiters are a love hate thing. A lot of the higher end jackets actually dont have them. Yes, they may stop the snow initially...but when they get wet..they can actually become more annoying. I think the key is having a long cuff glove.
And agreed that putting gauntlets over your sleeves works better but looks dorky...haha. All the pros sport it under...so that must be the right way!
I have had fine success with over and a synch, although I feel a lot has to do with the jacket. Right now I'm wearing a NorthFace Dolomite jacket and that thing has more ways to hook additional gear on to keep snow out than i know what to do with.
But another reason I like the over is because it seems to go with the grain of when my hands go through snow.