Tsubasa: Tokyo Revelations was pretty special at times, it had the kind of CLAMP magic that you see in various other media by them, such as Magic Knight Rayearth, Cardcaptor Sakura, or even Code Geass.
The kind of annoying thing is it has this spark of imagination that is so often underpowered because it ends up being poured into a conventional kind of gooey cheesy romance.
Moreover, there is a grating sense of disconnectedness fueled by the anime's bizzare relationship to the previous anime, the manga itself, and events in the future, as well as current events, which all do not ever really feel that they are all heading totally in the same direction.
It's a mixed experience for me, and this sounds like it almost wasn't worth watching, so I wouldn't be surprised if other people felt the same. In other words, but anytime CLAMP does anything I think it is something unique and interesting, but all the possibilities drown beneath so many other wild and erratic things it becomes difficult to stand firmly by it.
CLAMP will always have this weird special thing with magic or honesty or something that tends to raise an interest or catch your attention, but outside of maybe Cardcaptor Sakura it never really felt like it coalesced into a formidable current (and maybe not even Cardcaptor)
A 6 seems appropriate.