Base Game suggestion: Heterochromatic Eyes

I know there's a lot of custom content that Simmers have made to address the issue, but these all require finding the 'eyes' in makeup or jewelry or wherever the Simmer decided to categorize them. Wouldn't it be simpler to just have check boxes for both right and left eyes and if you uncheck one of them you can make that eye a different color than the other? 

Seems a very simple toggle to program in and real people have heterochromia sometimes.