Nice job, mapigold. I got the 'clobbered by asteroid' image even without the "Impact" title on the thread. You're right - the more diffuse shallows on this latest iteration is a better look than the former uniform band. And yeah, adding more shallows will be good too. Continental shelves aren't uniform-width.

I know you're intentionally holding back from labeling, but can you give a general idea of your intended scale?

And kudos for posting a map right away - nicest way to introduce oneself!