The thing that this particular teletubby interface update broke is information density. After the update, the new skin in both gmail and calendar quite simply puts less on a screen. On the desktop it is annoying. On the mobile devices with limited screen real estate, it is downright devastating for usage and productivity.
It's as if since the turn of the century, user interfaces have been continuously redesigned to be more and more friendly toward children under 2 - with rounded corners and buttons too big to accidentally swallow. It's as if Fischer Price have been contracted to do user interface designs ever since.
Someday somebody has got to decide whether the typewriter is the machine, or the person who operates it.