I agree, longer wheel base is better. Also I don't know how the hitch is attatched to the frame. Any good trailer shop could upgrade the hitch. The engine, HP, Torque are fine. You can manually select the high gear, to avoid lugging the engine. Also weight of the tow vehicle is important.
Some of those factors can be addessed with an after market axle mounted hitch--but I would not use a Bronco to tow a full sized 22 C Dory long distances. However to the ramp a few miles away, probably not an issue (except the insurance, which is questionable.)
As for surge brakes, vs electric over hydraulic--the E/H is far superior to stop "wagging" or the extreme "Jacknife". The E/H is controlled by the vehicle operator and can be independant of the tow vehicle.---the surge is dependent on the braking effect of the tow vehicle--let off the brakes on the towing vehicle, and no surge brake effect.
Comparing the Yukon LX vs the Bronco is apples to organges. Bronco wheelbase is 116.1 inches; curb weight 4000 to 4500 lbs, vs the Yukon xl (which I used) of 134.0 inches and weight of 5700 lbs to 6500lbs. When I towed the 25' C Dory with the Yukon, I had the hitch beefed up. Adjustabe capacity Air Ride shocks were added to the rear axle (I had used a weight distribution hitch on a Ford Excursion earlier).