Would be nice to be able to see OTF features which work with web font variants while browsing for fonts, when a page of a particular font is opened. Perhaps a list of available OTF tags could be added on top, and they can be clicked to apply them to CSS below.

I know from a consumer standpoint it seams easier than it technically actually is, but I also believe it shouldn't be too complicated to apply the CSS option at least to the "Details" display field of a font.