The types of changes in the new Player's Handbook seem to equate to the same types of optional changes you saw in Tasha's and Xanathar's, so unless we refer to using those books as an "optional new edition to 2014 DnD" I don't think it's fair to say the 2024 Player's Handbook is a new edition. It's more of a revision or massive errata with expanded options for player characters, you can still wholesale just use older subclasses with the only changes being to ones that granted the subclass at level 1, which is just delaying the new features until level 3.
I'd say especially since the majority of the changes just seem to be things copy+pasted from those books and then reworded slightly, like crafting, tools, and many "new" character options.
Maybe I might change my mind after a year of play if it feels sufficiently different, but after having read through the UAs and seeing the videos from people who had received the book early, it does not feel or look like a new version of the game, just a revised one.