re: Any drills work to eliminate a bad over the top swing?

Like some other poster said trying to guide the arms is a band aid

You need the lower body to work correctly for the upper body to follow correctly. Clay Ballard has a good video on this.

A totslly upright spine or spine pointing to the target is the issue. Once you rotate from this position the ONLY thing your right shoulder can do is swing out and throw the club over the top.

You need the spine to be slightly tilted away from the target when you start your transition. How you do this is get pressure to lead foot. People argue whether there is a lateral slide of the hips or not to get this started. My belief is there ALWAYS is a lateral slide. It just differs on how much.

When you move the hips correctly the spine tilts away from the target and allows the right shoulder to work under the plane. This promotes good contact and shaft lean and all the good stuff.

Imagine if you tried to kick a field goal or a soccer ball. You jog up to the ball, plant your foot and your spine isn’t straight up or tilted toward the goal as you kick at the ball. Spine tilted away because your hips aren’t directly under your spine they’re a little ahead.