That's fine, but round corners are not only an anesthetic choice, but also a structural one. Sharp corners and abrupt changes in geometry in general are bad for stress concentration, impact resistance and honestly also for handling.
I don't think it matters here much, and if I'm not mistaken, there is even a slight radius on the corners.
Interesting. What's the particular application that would warrant that? I'm asking because conformal coating could be applied easier.
Also, do. you plan to stick to a certain resin, or do you have a little test setup to adjust for e. g. differences in viscosity?