in terms of the layout, definitely interesting and thinking different!
however, to me it looks a little messy and wastes a lot of space -
consider shortening right shift .25u so you can bring arrow cluster in line with the mods
consider abandoning the left macro column and moving the oled to that side - this will give you a clean 660 design with extra rotary and oled on the left - you could even still have a full macro column on the left, with the rotary and oled shifted an extra column over! or alternatively, abandon the 3 keys above the arrow cluster and move the oled in line. I think these would give you a more balanced and aesthetic board.
interested to see where this goes!