Excellent new version dev!
For those who think it doesn't fit in with the iOS 7 look you're dead wrong. The red is bright red, the white theme makes it feel more stock and all the little animations feel more like 7 than 6.
They've added plenty of new features (Reminders, directions for locations) and really tweaked how it works for the better.
The only thing it's still missing is showing empty days in the list (not just the calendar strip). That still screws me up when it hides the days that have nothing in them.
I like that they don't show days with nothing on them! Great feature for me anyway.
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tweetbot 3 is a complete redesign of the original app, not a superficial update. All new physics system, new animations, etc. It is not a reskin like you claim. Also, there is a reason for getting rid of triple tap, it actually makes the app faster, again contrary to your claims that navigation has slowed down. Sometimes you have to understand that with a new redesign, they can't always implement the same features as before in the same way, because they wouldn't make sense.
Tweetbot had to do this. The iOS 6 version while good was very foreign as an iOS6 design style. Would really have been out of place in 7. Fantastical's design fit better already. Heck, apple even semi-borrowed their scrolling day menu.
I was surprised Apple didn't go with the natural language input to iCal. This makes Fantastical stand out. I call it Magic Cal!