As I’ve said, I’m quite familiar with the genesis responsive slider and how it works, as well as familiar with the regenerate thumbnails plugin. The test site I shared was only to show you how the slider was off center with the image sizes provided in the instructions, so nothing else there needs attention other than the slider offset issue.
We’re almost there with the slider. The new 1140 size did make the difference on the centering, but the 350 height still hides the “shadow” image that should align with the bottom edge of the slider image. Is the height of the slider also intended to be different now?