I suppose you have a point, in that modern apps built with whatever it is that gives them that "Metro" flat look are either entirely ignored by Windowblinds or aren't quite entirely skinned properly with it but my point was that, in terms of stability, Windowblinds is a lot better now. I guess I'm more forgiving and I tend to spend more time with older software anyway. It's ironic that the Object Desktop Manager is even built this way (and so isn't skinned by WB either!)
I tried a couple of the apps you mentioned and Chrome runs fine but yes, the title bar doesn't skin properly. It's still completely functional though. I had no trouble with Nox either but you won't see WindowBlinds even touching that one. Is that really a big deal though? I haven't tried any others as my computer is quite old so I know for sure that OBS won't run well for me for example.
I have the same problem with Steam but it runs fine. And while restoring the window size messes things up, I can drag the window out so I can't see the funny edges any more.
I think I just must be more forgiving as I don't have apps crash (except Paint.NET so far) with WB these days, which did used to happen more often back in the day. I love the look of my computer running Stardock software and I think things I used to run years ago still compliment Windows 10 nicely nowadays.