[NiLuJe]

Not that we know of (EDIT: Speaking of the light stripe on the button's side, which is the only actual real issue, everything else you mentioned is gobbledygook in practice. There may also be a very, very, very faint horizontal gradient in light intensity, but that's much harder to discern, and par for the course with light guides anyway, especially at that screen size).

Whether it actually bothers you enough in actual usage (as opposed to nitpicky examination) to offset all the good the Forma has to offer, you'll have to decide for yourself, which, granted, is easier if you're in a location where you can return it without much hassle in the (unlikely) case you're not satisfied with it.