I've been plowing regularly this winter without the chains on the front, The light snow has fine but now as the snow hardens up I'm staring to notice the lack of traction. It's just a matter of time before chains are on all fours. That said I'm impressed with how well a quad pushes snow, A wider plow might be nice but all in all I'm happy with it.
Craptabulous, it's funny you mention beefing up the plow frame, that's exactly what I did and have heard of a few others doing. I have a 5' Moose plow set up, the factory welds, or lack there of, are a joke, I completely rewelded everything and gusseted it with 3/16" plate. I also have one of the large Moose drop-down rear racks on my quad, I reinforced that as well, once done it's been a great addition to the quad. I like the design of the Moose products but the craftsmanship is is pretty cheesy.