Love the before and after photos. I very much like the future cuttings. Are you sure about the low angle on the new lower branch in the future photo though? Perhaps tilt it a bit up to make the composition more balanced?
I also quite like that low hanging branch. But what we like doesn't matter. Bonsai is an art form and you are an artist. If your vision for this tree doesn't include that low branch, then you must cut it off! It will look great either way.