GFCI upstream or at the bathroom outlet.
Translucent glass in bathroom window, maybe tempered.
Shutters or blinds or shades.
Toilet paper holder.
Access door on tub wall in adjacent room to access bathtub plumbing.
Angle stops, the kind that only rotate 1/4th turn.
Lighting judged as flattering by women.
The holes in the vanity for the pipes are difficult to locate because the drain needs to pitch down slightly. You could oversize the holes vertically (slots) and then make two cover plates from thin plywood that slide together like scissors to keep out mice.
To find exact pipe ODs, cut a strip of paper, make two marks whose distance apart is the pipe circumference and then divide by PI. Nominal ODs are not equal to actual ODs. Make the hole diameter 1/8" too large and caulk the difference.
Calipers? We don't need no stinkin' calipers!