I think Teare will do great at the WCs.
He clearly has the finishing speed to easily navigate rounds. He's fast enough to advance if one of his rounds goes fast.
In the final, if it goes slow, he's a medal threat with that speed. If it goes fast, he won't be leading so it will be a paced time trial for him. His PR in the mile is worth about a 3:33, so if he runs a PR type race, he should be 3:32 or better. That's approximately equivalent to Hocker's Olympic performance, so top 6 or so. Then there's the possibility that he has a legit breakthrough, which would put him in the medals in a fast race, and possibly 3:30.x time (or better).
He has home crowd advantage as well. I think he'll have a great championships.