I've been using Outlook since the first beta hit, and Outlook 2013 still drives me nuts. Whether you get your copy of Outlook 2013 from Office 365, from an Exchange Server license, as part of the Office 2013 package (any version except Home & Student), or as a stand-alone product (yes, some people still intentionally pay money for it!), Outlook 2013 has some, uh, quirks that can be overcome.
I can't help you with the IMAP bugs, and I refuse to tell you how to pimp the Weather bar. One must maintain certain journalistic standards. That said, there's a handful of things you can do to make Outlook 2013 marginally less irritating. Here's my top list.