When I got my 1050 a few years ago I wasn't sure how much power it should have. It ran ok, and I had to fiddle with the carb, new spark plugs, timing, wiring, etc. It still worked. Mowed the yard, blew snow, tilled some dirt, then moved it around with the plow. As far as I knew it was working as normal. Last spring I decided to replace the head gasket to try and fix an oil leak. Replacing the head gasket made it seem like a new engine. Now I can mow twice as fast as before. I am anxiously waiting for snow season here in WI, if I am honest. Always had to work the speed just right, but it would still clear 2 feet of snow with half the HP it was supposed to have. Granted you have a lot more experience than I do with tractors, but I have to throw my 2 cents in. I still haven't gotten the carb working perfectly now with the new head gasket and new compression, but it still works every day I need it to.
I also found it is a much more pleasant ride without the wheel weights in the summer. I did put a new clutch in it after a bearing failed in the drive shaft a couple years ago. Found out the hard way that mowing in H-2, with the new and improved engine, while turning the steering wheel, it would lift the front tires off the ground slightly, which made turning very easy, and if your thumb is hooked in the steering wheel, it will hit the stops and slightly dislocate your thumb.