Hello Hendrik,
the work center view is a new performance optimized version of work center view "Accounts".
Currently this version comes with some constraints w.r.t. extensibility and default sets.
Please check the What's New page for release 1605 for further details:
http://help.sap.com/saphelp_byd1605/en/KTP/Software-Components/01200615320100003379/WN/StableLinks/WN.html
Regards,
Knut