You know what? I stopped waiting for this nonsense and instead downloaded Microsoft's One Note. They even have a tool to import your Evernote stuff. Plus it's FREE and they have plenty of highlighter colors.
First time here in the forums, and I have no idea if suggestions here translate to implementation in future iterations, but +1 for me as well. I use Evernote (Premium) for a variety of things, and one feature I'd really love would be multiple highlighter colors - yellow is fine for "in progress", red would be nice for "work needed", and green would be great for "finished".