Yes, considerably boring. That said, the point of the questline is for the Aspects to retrace their steps and reintroduce Tyr into the MMO, and the constant delays to it as the Aspects nevertheless solve their problems of their own accord is to build up to a "The answer was in your heart all along" reveal. It's a pretty standard plot route.
As for whether it's worse than BFA in terms of plot structure, no, in as much as the plot is coherent. Things advance from Point A to Point B. If it outsources its conclusion to the next expansion then at least the steps to it have followed from each other. There's no "God of the depths in the naval expansion is fought on dry land in a volcano" tier of disconnect.
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Nymrohd
If it's not major content, i.e a replayable dungeon or raid, then it remains a cop out. See also BFA outsourcing its main plot beat to five quests and a fucking cinematic in an otherwise empty patch. The gameplay and reasoning of WoW means that major plot beats happen in raids. Aberrus is a good example of that. It doesn't move the Iridikron plot forward, he explicitly doesn't care about the place, but it clears the B-tier villains and is core to the conclusion of the Black Dragonflight story and Deathwing, which are mandatory aspects of a dragon expansion.