That's interesting because I think exactly the opposite. In fact I was a fan of the Apple Calendar on all my devices until the iOS 7 changes and now I can't stand it, I think it's too difficult to understand what's happening in my diary and the very reason I tried Fantastical as a replacement.
Overall I like iOS 7, it's just the calendar I can't work with.
I'm with you, the latest Apple Calendar is a shocker. It worked well before then they change it in really stupid ways. Classic case of form over function.
And someone explain to me why virtually everything in the iOS is flick side-to-side yet the new calendar is a flick up-down?