Yu-Gi-Oh! R/Headscratchers

The use of Grand Theft Me leads to some Fridge Logic about the choice of victim. The criteria that the vessel be a healthy non-Duelist whose possession would hurt Yugi applies to both Anzu and Honda. Sure, she's the Love Interest, but wouldn't a boy be a more preferable vessel? The Abridged Series would have a field day with all of the implications...
- - Though in volume four, when the RA project nears completion, it appears that Anzu's body is merely being used as fuel to recreate Pegasus's body with The Wicked Avatar. Not that it matters too much in the end...
Speaking of Volume 4, something happened near the end of Kaiba's duel with Yako... Or rather, didn't happen. Specifically, the scene is as follows; It's Kaiba's turn, Yako has no monsters, two facedowns and 1400 lifepoints. Kaiba, meanwhile, has 3 Blue Eyes waiting in the wings, even if only one can attack. Rather than go for the kill, Kaiba draws Polymerization and proceeds to fuse the 3 Blue Eyes into their Ultimate form. Then Yako does his thing by summoning up the 3 Blue eyes Kaiba just fused, with one card. Okay, but Ultimate has 4500 ATK to the regular Dragon's 3000, the difference is large enough for Kaiba to strike any of them and win the du-... Wait, he ENDED HIS TURN?!?! No, there wasn't a single effect in play that would keep Kaiba from attacking, even his own virus card which he specifically planned for! This does not make sense, Ito! Cue Yako pulling a Curb Stomp Battle, meaning Yako very nearly succeeded with all his plans because of Kaiba failing to beat him. Aaaaaaall of Volume 5 could have been averted if Kaiba had just finished him off already!
- There was originally a rule that fusion monsters couldn't attack on the turn they are summoned. Kaiba probably had to end his turn after fusion summoning Ultimate because of that.
  - Which begs the question... Why bother fusing them? Why not just take the one Blue-Eyes White Dragon that could attack at that point and end the game with it? Anything he risks with that, he still risks with the Ultimate.
  - Also... While the fusion attack rule was present in the original series, the Special Rules section in the same volume, by the writer, Akira Ito, presents no such rule. Which... Really just makes it all the more baffling.