Yeah, we have a thread on here about this topic that’s more detailed. Your original thread (here) started some of this odd editing playout. However, it is strange that Friedkin edited the ending without a little more “walking time” for Father Dyer.
If I remember correctly, in the other thread, there was a discussion about the entire configuration; i.e., if Karras threw himself out of the window, he had a long way to go before he actually hit the first step. It appears as if the Hitchcock steps are right beneath Regan’s bedroom window.
FB