Change the light fixture and frame the mirror in wood. This should give your bath an updated look and feel.

You will only have a small hole at the back the rest is just screwed to the wall so a little filler and sanding will take care of that before you paint, these fixtures were horrible light anyway. This is one from Wayfair it is 252.00 but it is 42" long has halogen light so lots of light for the bathroom and can be wired into existing box if you are keeping the sink or sinks centered under it. But it really would not cost much to have an electrician come and give you wiring for 2 fixtures.. This vanity space does not look very large if it was my bathroom I would just put in one sink and have more counter and some good storage for all the clutter, I always ask clients how often they both brush their teeth at the same time and the answer is usually hardly ever so why 2 sinks. Ikea makes anawesome bathroom vanity that has drawer storage underneath in stead of a cupboard and it is great, I have 3 clients now that have thias and they love it. It can hang on the wall so no legs to clean around and the organizers are awesome.