I know there aren't unlegended novelties in this, but it'd be nice to have something as a 1u R3 other than "escape" and "tab" for ortho users. Without it, preonic folks are basically forced to have two escapes or two tabs on the left side (or ~ ESC tab, which is just terrible)
An unlegended novelty would be ideal so it can be whatever key you want, but a CTRL or FN (there's a non-1u FN there already) would be dope.