Welp, it took some time, but you're right about them coming back... I just sent a note to them as well. Totally unacceptable and makes the case unsuitable for use IMO.
For anyone else... I'd wait for a revised version to come out before ordering the Spigen Ultra Hybrid. That sucks.
I think I may end up going that route as well. I'm not sure if you mean a silicone skin or a "film", but I just ordered a clear film wrap from slickwraps (essentially a clear gloss screen protector for the rear). My main goal is just to prevent excess scratches in the least invasive way possible. We will see how that is, if it sucks I'll just go naked.