Yep, you stop noticing the corners pretty quickly. We thought about introducing rounded bezels to match it, but didn't want to introduce bezel fragmentation.
Speaking of bezel hardware changes, people keep asking for the 13 to operate better while closed. I took a look inside my 13 and found that you could make a bezel with an indent or cutout on the hinge cover at the vent location and almost completely unblock the heatsink exhaust.
The only tradeoff I can think of besides inventory fragmentation would be appearance while open (no uniform bar the whole way across).
Not important for me personally, but it would make it a better option for those who use the laptop docked to a much larger screen perhaps with an eGPU.