It adds configuration switch for the Winbox, as previously you can apply configuration from console only.
Ports are not added to the switch by default, isn’t it?
I mean, to be able to use 65535B packet size. See http://forum.mikrotik.com/t/routerboard-433ah-3v1-chipset-problem-ip175d/36800/1 The answer from support was that disabling the IP175D features would not bring any benefits other than be able to use 65535B packet size and I suggested to put it configurable somewhere via console/winbox. But I guess this release implementation does not sort this out.