My humble opinion but you are better being flat than steep as long as you arent really overdoing it clearly. More power for sure. I find my arms are lower than my shoulder plane at the top (a la Hogan) as I have a One Plane Swing takeway (inside) but I can really come down hard from there and get more rotational power. What Ive done is experiment with setup and swing path to hit draws/fades as required as a pull hook is my bad shot too

Draw. Align to the right. Close the clubface at address. Swing to right field
Fade. Alight to the left. Open the clubface at address. Swing down the target line

Im finding recently than if im having a day when im hooking the ball its either because my tempo is off (too quick) or my swing path is out (i.e not out to the right). On those rounds i'll go back to fades and play with what I have on the day

I believe Hogan used to fight the hooks but developed a grip, setup, swing path etc that allowed him to hit fades without rebuilding his swing