Sorry to bother you further but I'd like to add something to this:
I forgot which song, but there is (at least) one where one of the hitcircles is actually partly behind the 'show chat' button. Or the other one next to it. In any case: it effectively removes about a quarter of the area on which you can click, because if you click that part the only thing that happens is chat opening.
Since I don't think people want to play and chat at the same time (or at least not when not paused), wouldn't it be an idea to make at least an option to not show those two buttons at all during playtime (... except when paused perhaps)? There's always F8 and F9 if you really want to open chat / players screen, and it fixes all the above problems.