Update how? What are you trying to achieve? Fairly easy to remove the upper tier and make it all one level if you want to install new counters. A larger change would be replacing all the island cabinets to eliminate the angle- ie get a large rectangle instead. Of course that’s $$$.

Doing something different to the island will only draw attention to what remains. And make it look much worse in comparison.

If you’re on a slab, it will also mean cutting holes in concrete to move plumbing.

What is your budget? Indoor outdoor are rugs would be an easy way to add an updated pattern to the space and they would help break up all the white.

Whatever you decide, PLEASE make room for a trash drawer pull-out adjacent to your sink. Having a "can" visible spoils the look of any kitchen.

I like the idea of adding wainscoting to the back of the island. I'd also replace the counters and the flooring. The cabinets look nice.

Yes to new countertops, backsplash, and a decorative finish on the island or paint.