Mhmmm ..imo the most problem from the guys here that dont like the standing box in the header is that i makes no sense !
Why have a box on every page visible ? On some its than double to see ..
A header is a header with some information that belong there ..but the problem is that it dont even scale in any direction like see here :
That little arrow for the icon bar is just not placed right or

The calender should be aligned right not left to the buttons imo
But once again the magic word imo is OPTIONAL .. not hardcode some features 16 versions no one asked for ...
just my two cents .. and hopefully we get a new skin without it or even make it optional in a future patch ..so long we have to live with it sadly.