IMO, there are several different universes at play...we shall call them A (for the original one the pilot started off with), B (for A's counterpart), 85 (for the 1985 episodes), C (for the new timeline where Peter is 'trapped'), D (for C's counterpart), and now F. I had found myself not liking season 4 so much because, for some reason, I was not interested in universes C and D...A was the one that I was interested in. But my first taste of universe F has me enthralled, and I could take a good 10+ episodes of this before going back to the original universe...but will it? A cheap ploy to stave off cancellation? Perhaps, but as far as my first look at F, Im all in for another season.
Review of Letters of Transit
