The downthrust may reduce the ballooning but the engine and airfoil are fighting against each other so the increase in speed will not really match the extra power input.

A plane flying at full speed with a drooping tail much have an incidence problem on the stab? After all, the fuselage is just holding the wing and stab together, so if the angle of the fuselage is odd then there is something not right in the decalage I would think.