I purchased the 54" Hydraulic blade my JD 4115 and it has performed well in cleaning up the snow (so far the max has been 16" in one snowfall). I removed the FEL and 60" MMM for snow removal (it takes about 3 minutes to remove the FEL and 3 minutes to attach the Blade). It is my opinion that the blade is very useful but I would like to have a 72" blade for the extra width beyond the rear tires when angling the blade.
I believe some advantages of the blade vs. FEL for snow removal are, more manuverability in small areas and pulling up to the back doorway and garage doors and back dragging the snow. A disadvantage is you can ony push the snow so far and could run out of space to push the snow (which has not happend yet after over 2 1/2 feet of snow). If this does occur I will remove the blade and reattach the FEL to relocate the white stuff. Even with the FEL snow relocation can become a problem if there is to much. Removal and attaching implements should not be an issue after all isn't that why we bought a tractor for working,versatility and fun?
My driveway is a "Y" shape with each leg about 35' long and 10' wide, at intersection of the legs it starts to splay out for 40' to match the garage width of 31'.
The large snow stroms this year snowfall took me approximately 1 hour to complete with the JD 4115 and only 5 minutes of manual touchup shoveling). The other small snowfalls so far have taken about 15 to 30 minutes to complete.
The tires are filled R4s without chains and have not had any real problems with traction except when the amount of snow outweighs the tractor.
I have used the blade for rough land leveling and it works quite well but your running over the dirt and do not have the visibility you would have with a back blade but you can backdrag and with a bit of practice you do just as well.
Just my opinion.