It already exists. Well, I guess it doesn't for the Apple-addled as it's only available for PC's and as such they'll be actively ignoring it, but solutions in that area are pretty plentiful - just not for OS X.
I'd like something similar since whenever I turn to the Pro's it's like wading in treacle even for the relatively little / trivial tasks (that befits OS X) that I do on the Macs these days, and there are also limited options beyond this card but even they're just way too kludgy.
Maybe a Thunderbolted Pro will cure all this and render such solutions unnecessary (though I kind of doubt it). Maybe I'll have to replace all my Pros again before then saying "Right, I'm going to run these into the ground before bugging out of OS X". We'll see.