Without protrusion you can't remove the cliped side panel. You need a small surface for your fingers.
Just an idea for removing the side panel without needing the protrusion. How about a panel removal “tool”?
I was thinking of something like a U-shaped piece of metal that would fit into two of the holes in the side panel and then be pulled backwards to move the panel back far enough to release the clips. I had to use a similar method to remove a Mac Mini motherboard if anyone is familiar with that process.
For the glass side panel a small suction cup could be used, similar to the one included in iFixit’s repair kits.
Based on the most current images, I do like the overlapping panels all being even at the rear of the case.
Hope everyone has a great 2019! - Year of the Dan C4!