It'll be fine. It's supposed to be that way and there are plenty of other Czarface figures to fill it in. Playsets from the big boys usually only come with one figure or nothing, so it's not an issue. Yes, it'll also be pricey, but that's also OK, too. These things don't make themselves and Super7 isn't Hasbro/Mattel. This will make the 5th playset in this style they've released (2 versions of Alien, Planet of the Apes vintage, Phantom Starkiller, and now this).
This is a fun piece but I bet it's going to be way over priced, the diorama is way too big for just having 2 small 3.5 inch figures on them, if there were more characters to fill out this dio it would be hard to say no to, but it looks kinda empty, plus like I say before I imagine this won't be cheap, I'm just going to wait for the Ultimate figure, and hope they maybe do an Impostarr there in time.
