Thanks for the comments, guys. Regarding the electrical, I have a 135a alternator so I'm hoping that helps a bit. I have a beefy deep cycle battery that I got when I first installed my winch years ago. With no more than I plan to use it, hopefully it'll be sufficient. I'll be sure to keep an eye on it though.
Mounting it to my axle helps while the blade is down (absolutely zero load on the suspension), but the suspension is still supporting the entire weight of the blade when I have it lifted. It's actually supporting more than the weight of the blade right now, because I'm lifting it from behind the assembly's center of mass.
Here's a pic to show how it squats with the blade lifted. I have about 1.5" of compression before I'm on my bumpstops.
Think of carrying a bowling ball with the finger holes vs carrying it while it's cantilevered out on a 4' rod. Your arms (my winch and suspension) see a far greater force when lifting a cantilevered load. I may modify the lifting point to take some of the weight off of my suspension when I'm going down the road, but it's drivable right now.
I picked up a flat 2" strap to replace my winch rope as well. That'll prevent damaging the end of my winch rope from lifting and lowering at such a steep angle.
And yes, I've already heard from relatives and friends, haha.