I have read through this thread a few times and the discussion is very interesting. I have read this card and re-read this card. As someone who still plays Tezzeret, the Seeker. These cards cannot really be compared against each other.
I play Tezzeret, the Seeker in decks that run Time Vault, and Yawmoth's Will and I see Tezzeret, Artifice Master only fitting into a LandStill style of deck or maybe a Blue Moon. These styles of decks and styles of play are diametrically opposed to one another.
I like this card on it's face and I like Teferi, Hero of Dominaria but I am all in on combo right now so these cards do not appeal to my current play style.
If I were inclined to play a big blue style of deck then I would seriously consider this card over Terferi and even over Jace, the Mind Sculptor and there are a lot of reasons why. If you are playing a big blue deck then you need a clock to end the game. Putting 2 or 3 1/1 flyers is often enough and JTMS adds a clock but is much more venerable because you have to keep doing the fate seal, whereas Tezzeret can create 3 thopters then just draw cards. It depends on how you view the meta-games as to which is better.
The comparisons to other planeswalkers do offer insight into how you would rank planeswalkers but does not focus on why you would play them. Dack Fayden is often consider the best planeswalker in Vintage but I think he is somewhat overrated. Don't get me wrong, he is great in the meta for his cost but you are forgoing other cards to play him and for a Jeskai deck that may be worth it but for a big blue deck Dack is awful.
I overall like this card and if I were on control right now, I would seriously consider playing this card as a 1 or 2 in a big blue shell.
