Ah yes, I forgot about the whole iMessage and FaceTime thing. Yes, you're right. But I still think these two things I mentioned are of bigger importance.
Also, when you mention "native" video calling, they should add support for the REAL native video-call, as well as the Skype thing ofc.
Another thing I want to add is that the Messaging app feels pretty basic. I mean, it's kinda OK for texts, but for Skype it's not. We're used to the blue and white colors, to the cartoonish design, file and screen sharing. You can't just say oh screw all that, here's only IMs. I don't see why Skype shouldn't just stay Skype, a seperate app, bundled with the OS, that works great on it's own. It can still be used to parry iMessage and FaceTime, while keeping it's own style and functionality.