Thomas' last name, Norstein, being misspelled 'Nordstein' in the final episode may seem like a production error, until you realize that given where he studied and the general sound of his name, people in-universe might think that 'Nordstein' may genuinely be how it's spelled, like the confusion regarding Jesse Andersen's last name. note the d in the scandinavian word for North is silent. It wasn't as though he could correct them on the mistake, or even would care to at the time.
Mixed with Fridge Horror: Yggdrasil's extreme actions become much more understandable once you realize since the Digital World is for all intents and purposes his body, Kurata might well have caused injuries analogous to brain-damage.
Now we have Savers, which seems to go back to basics with just the partners evolving right? After all, after having the kids become Digimon, where else can they go? How about having the humans knock out Digimon without their partners at all. Masaru (and more to the point his dad, who could fight Ultimate/Megas level Digimon to a standstill) actually represent the next logical step, while at the same time, allowing Savers to go back to basics with normal evolution. Genius.
One can even say that's the whole point of the Digisoul in general, humans gaining powers comparable to Digimon.
The absence of the Royal Knights could be construed as a sign of Savers having an Idiot Plot. Or it could be construed as them being occupied in alternate universes at the time. After all, Crusadermon's and Dynasmon's antics likely aren't appreciated by the other eleven.
Why didn't Ikuto's Digivice break when he Digivolved Falcomon to Ravemon for the first time, unlike the other three? Because he's emotionally more stable than them when he did that.
To elaborate, prior to their Digivice's meltdown, Masaru, Tohma, and Yoshino were desperately begging Jureimon to stop protecting them and the Bio-Hybrids to stop hurting innocent Digimons. These intense, yet unfocused emotions caused their Digivice to break, as explained by BanchouLeomon in the very next episode. By the time Ikuto fights Kurata-Belphemon, he's very eager to defeat Kurata to avenge Yukidarumon and Mercurymon, and he has capable friends who will back him up when needed. To put it shortly, the lack of interferences from an innocent third party that could put more burden to his feeling was what prevented Ikuto from overloading his Digivice.
Why are the main character's digimon initially worfed by the first set of bio-hybrids, where the latter set are based on armor, which are usually seen as Adult/Champion class? Because the humans, who are adults, "evolved" into those bio-hybrids, which are perfectly even against RizeGreymon, MachGaogamon and Lilamon.
Armor-class Digimons in Savers seems to be treated as strong as Ultimate/Perfect class, as evidenced by Digmon from episode 5 and the Digimon army from episode 21, which consists of Boarmons and Pteramons.
Why did the second opening debut in episode 30? Because that's when Ikuto finally joins the main trio for real. Even though he accepted his place in the group in episode 27, he still went away by himself for one and half episodes to bring in reinforcements. After that, he stays permanently. So why don't we celebrate that with the opening that both acknowledge his existence and cement him as one of the main characters?
Lalamon more than once pokes fun at how such a Sloth Yoshino is. Come the battle with Belphemon, the Demon Lord of Sloth. Who is the one initially leading the heroes, with Masaru losing Agumon and Tohma defecting to Kurata's side? Yoshino, the Sloth.
Gotsumon's hatred towards Ikuto for being the catalyst of all the human-Digimon conflicts makes more sense when you learn that in a roundabout way, he was right. Without Ikuto's disappearance, the original Expedition Team wouldn't be formed, and both Suguru and Kurata wouldn't get to know about the Digital World in the first place. Sure, there were cases of mysterious disappearance prior to that, but Ikuto's was the final nail in the coffin.
Supplementary materials reveal that Yoshino was five when she received Budmon. That's three years before the first expedition to Digital World. Given just how much she hates her family, and Digimon's alien-like existence at that time, how did Yoshino explain Budmon to her family, and how could they allow her to keep a potentially harmful being for three years, or possibly more, depending on when DATS recruited her?