Well sports fans, lets investigate shall we? 1947 the Bo came out with ruddervator deflection from elev of 20deg and total of 35 with rudder. Flew fine right? All is good? So, in 1950, the Y brace inside was re-designed, and the trim tabs were flipped upside down so the camber side is reversed? Hmmmm, why would an engineer do that? All is good right? Seems not. 1951 brought about 20 changes to the ruddervator. It now had 22% larger surface area. The moveable part was bigger too? What could they be trying to tell us? Oh-ko, look here, the elevator travel has moved to 22.5deg up travel? Total rudder plus elev is still 35deg. My, lets think about where one would want to use max up rudder travel? Can you groc me? So, it's all good now, we have plenty of elevator travel and rudder travel to handle anything right? Well, guess what - I'm afraid not. Finally, in the K model, 12 years after the original design, they landed on the sweet spot with a total travel of 44 and 42 combined up travel with the 22.5 elevator only.
I'm sure all these changes were to sell more aluminum. Or, maybe make the plane slower? Surely they had no effect on the slow speed handling during the flare, which is where you would find a pilot all the way back on the controls.
CAN it be done without power? Of course, there's two ways to put energy into the system. Either use some power in the flare, or increase the glide angle a little bit. Way back to the OP, he asked which was right. Both are right. In the Comanche, and the Bonanza, either is right depending on how you manage the energy. I stand by my many, many landings on my home strip of 2600' grass where I take off and land on hot TX days, sometimes with fwd CG, sometimes full gross, sometimes things in between. Its a nice change to the 2400 x 20 I used to be at for YEARS.
I hope this little journey into the history of the Bo clears up the reason for the application of a little power on flare. It's not required, it's not mandatory, it's not going to break the plane. But - it will make for a nicer touchdown. Either that, or turn the fan all the way off and increase the glide angle a bit when at fwd CG. That's all I've been saying. You have other opinions, I've got no problem with that. But - the engineers at Beech seemed to have a problem, cause they kept changing the ruddervator geometry for some reason. Or, maybe it was all just voodoo.....