You know, a Baro does the same thing, but thermodynamicly.
If you have no MPD, and a baro in the flue, if the temperature in the chimney drops, and therefore the chimney draft, the baro closes, sending undiluted hot air up the chimney to warm it, producing more draft, which it then controls with diluting the draft with room air. It's a self regulating system.
Your stove creates lots of draft when there is heat, but a lot less draft when the MPD is closed, blocking the heat from keeping the chimney warm..
Unfortunately your chimney is one that needs some stove heat sacrificed to keep warm to keep the draft strong enough.
So with the draft inducer, you are electricly overcoming what a baro would do automaticly.
If you are only comfortable with the electrical stuff, OK, but I think you are just adding unneeded complexity and reliance on electricity.
Just my opinion.