First of all, they're completely unplayable with the Invoked Engine, as they should be. moving to 3), however, their use will still be scarce over the meta game. is obviously the heavy hitter here (Along with Loading. + Draw Sense: Low Level a thing for the deck, which can now be summarized as 'Buster Blader but Worse'. is a buff to SelFTK decks if anything, and the Spellbook cards being out of the list makes Loading. or 2 Econ / 2 TTH, which isn't that big of a change, Loading.
changes pretty much nothing in Dark Magician lists besides for the fact that pure lists can now run 1 Loading.
What we can be upset for is that not MORE stuff got out of the list, as what we've been given is quite lackluster to say the least. The only thing I seriously expected was Loading. If you had done that, you'd realize fairly soon that no hit it to any deck was actually needed given that our metagame is incredibly weak right now, and that the only thing we need is just an influx of new and more powerful decks to make oppressive techs less decisive than what they are right now (Right, Loading.?). Mine might be an unpopular opinion, but I think that whoever complained about the banlist did not play 200+ games this KC or just doesn't play the game at all.