He is definitely a bit too good. Though the story was specifically about his one area of expertise, and they did at least show that he was about to have a major nerd blowout by going into the intricacies of dwarf Rune linguistics, so he isn't completely flawless.
Hopefully TWW let's him be even more of a nerd, as that is something we don't really see in WoW much.
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The part where Dagran is about to go on a nerd rant about linguistics felt very real at least.
I very much enjoyed how Moira is coming to terms with how in trying to avoid the issues Magni made with her, she is about to make the exact same issue with Dagran from the opposite end. Was nice to see her very realistically struggle with the knowledge that she is far more like Magni than she realized in terms of being overprotective.