Some wind turbines have adjustable tips, so the technique is viable. Complexity might count against it, depending on packaging - bear in mind FBW systems still use Brushless DC motors to actuate a mechanical swash plate. In theory if there was an accelerometer at the tip the tip could be continuously trimmed to null out any vibration. This would totally damp out any blade flexural modes.
Comanche has shown that careful design using the basics also works well. BERP is old hat now, but would be very sensitive to tip vortex variation caused by surface features affecting laminar to turbulent transition. Again most of the pitch loading would be caused in the retreating portion, since this is where the vortex is used to generate extra lift at low speeds.
On balance, i would go with Bug's idea.
Mart