Re: Are you ready? Probably not.
I don't think a Service Pack will fix this. The issues I have with it are fundamental design choices. Search bar integrated into the taskbar, hybrid and very cluttered Start Menu, Cortana intended to be a core part of the experience yet unusable unless you grant Microsoft permission to rifle through your emails and txt messages for supplementary information, the hideous inconsistency of settings between programs and OS, the unnecessary windowing of the formerly clean Metro interface.
I am for the first time in a while seriously considering switching back to GNU/Linux for my primary desktop needs.