Good point regarding tire type. I would also think that the more weight you have on the rear will leasen the downward preasure on the front tires. Kinda a lever and fulcrum effect. I guess we keep coming back to the same issue, proper weighting of the tractor for the task at hand.
To sum up what I have learned about FEL: With a two wheel drive and no power steering, weight on the rear is critical. Turf tires are not desirable when doing this type of work. Narrow front tires and proper bucket size is very important as well. Tires need to be properly inflated. Of coarse keep loaded bucket low when moving and be very careful on unlevel ground. Weight can be added to the rear by filling the tires with fluid, wheel weights, hanging a heavy implement on the 3pt hitch or making a 3pt weight box of some kind. I opt not to fill the tires with fluid as I don't want the weight when I mow. Bottom line, a 2wd tractor with FEL is a very useful tool. Sometimes a larger 2wd tractor will out work a smaller 4wd unit simply because of the weight factor.
If I had the 2010, I wouldn't hesitate putting the FEL on it.