This chart by Wolfgang Simpson is about the journey from the old to the new. You can't go from peak to peak. You must go down to go up.
-2 You're happy in the old.
-1 You want to leave.
0 You leave to search.
+1 You've found the new.
+2 You're reproducing.
Point 0 is a place of dying to the old. After getting to point +1, it is totally nornal to cycle back to point 0, according to Simpson.... and that's where we're at. I was listening to a micro church planter from Australia, Tony Collis, and he is having the same experience that we've been having: after feeling great in the new thing for about a year, then feeling a disorientation of "I don't know what I'm doing", and then going through a cycling back of dying to the old ways. This is totally normal, according to Wolfgang! You can hear him discuss this process here.
Go here to read a more complete set of notes on Simpson's migration thesis.