2021 Grizzly 700 EPS SE
I don't know much about the 2011's but I doubt you have issues with overheating on the XT-R. I plowed for a couple hours straight a few times last year with no issue. The engine heat keeps your legs warm, but the fan kicks on to keep temps under control.I've run that same Warn setup on my Grizzly 550 since 2011. I've now put the same Warn setup on my 2022 XT-R. Works great for most of my snow. Sometimes that 550 would get overwhelmed and I'd need to bring out the tractor. XT-R seems to work better with the couple of feet we've had so far this month. When I put the front mount on the XT-R, I discovered that the XT-R winch was on a different mounting plate that was "special" to the XT-R, so I had to buy a different winch mounting plate to get the plow mount installed.
I agree that you should have left the synthetic cable. You can buy short ones from Warn that are specifically for using the plow. You put a lot of wear on the a very short part of the cable when you plow, so no need to wreck a full 50 foot cable.
As for the snowblower, I've had one since 2011. How useful it is will very much depend on your snow and your situation. I have to clear a gravel road that's almost a mile long. My snow is typically very wet. For my snow, the plow works way better. When the now piles up on the side of the road, I'll bring out the snowblower to carve the edges and make the road a little wider. Otherwise I don't use it. I have become really good at changing the sheer bolts. I also find that I need to take breaks every 30 minutes or so to keep the Grizzly from overheating. I haven't tried it yet with the XT-R.
With the synthetic line, I'm prepared (I hope?) for when it breaks. I'm using the line that came with the winch. I have a few 1/4" cable clamps and a wire rope thimble (I think thats what its called?) so I can continue to use the remaining length of the synthetic line if/when it breaks. Cut off the damaged part, repair with clamps, keep going. That's the plan anyway.