The biggest update yet to iOS 7 is coming by the end of next month.
iOS 7.1 will bring changes to the call user-interface, new Siri voices that sound more natural (at least in the beta), improvements to the Calendar app, and overall bug fixes to phone restarts and more. Point being: if you have a serious beef with the OS now, this won't be the update you're looking forward to. If you do like iOS 7 so far, then this update will be comparable to laying down some polish on fresh sprayed paint. Apple has an event in March where they usually announce products and news, so it would be safe to assume the features will make their debut then.