So fixing the story we be chromie going to Arthas and telling him not to taunt us all over Northrend but just kill us? Because what he does in WotLK has all the signs of a poorly writtend BBEG.
Not to mention that Vanilla (and TBC to a degree) didn't know what character development is at all and just wasted/destroyed potentially good character all the time.
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Are you sure we weren't just brought to near-titan scale? (Agrammar in antorus being an avatar)
Since otherwise it wouldn't make any sense why we are able to see the Seat of the Pantheon's glow from Azeroth if it was so small.