Not really fond of "mix-n-match" continuity. Would anyone really want a live-action series, for instance, created by splicing together footage from the movie serials, the 1950's TV series, the Reeve/Routh movies, Superboy (1989-1993), Lois & Clark, Smallville, and the DCEU as if they were all the same character? One where it is left to the viewer to work out just how Michael Rosenbaum evolved into Gene Hackman and included both BvS and John Shea scenes.
Not sure how they could have done this better with the limits being to establish a past leading to Jon as part of the new status quo, but that doesn't make what we were given a good thing.
For now I can grin and bear it as long as we start moving forward without more references to history that none of us actually saw except in some different configuration.