Good idea, i'm using Mokee and it became one of my few favourites in a very short amount of time. It's the subtle things like in - app transitions and such. Battery time isn't at it's peak though but i don't mind that too much considering that i pretty much have to charge my phone every day regardless of what ROM i'm using.
Now, when it comes to framework, that is really a two pronged question, are we talking about enabled settings or just UI, because when it comes to UI you can use the kitchen to cook any UI down to the settings - statusbar soft icons - navbar icons - general dialer - sms app or any default interface but when it comes to adding specific settings you have to add code.
Like Mokee, that is mostly a collection of new code mixed with old code, the UI wasn't the first priority for that dev, for some others like MIUI it is and you can tell the difference.
I am REALLY impressed with Mokee and if C3CO isn't going to continue it i will, it's the first CM7 based ROM i've ever used that kicked the arse of all newer ones in terms of smootheness and i'm running it completely in a loop file on my sdcard, it is faster from there than any other rom has ever been on nand install!