Harvard just released a study indicating drinking coffee reduces the risk of suicide by about 50%.
Utah has a fairly high suicide rate, I'm sure from a variety of factors, but I'm pretty sure the coffee consumption rate is lower here. (Disclaimer: I own no stock in Starbucks, Dunkin Donuts or any other purveyor of coffee)
When I was a kid, we heard a lot of adverse stories about coffee, while the research in the past 10 years has been a lot more positive. I think the coffee and tea bans have become more like a sacrifice to buttress faith, like Catholics giving up something for Lent.
A LDS intellectual I work with said the ban on hot drinks was intended to keep the faithful out of coffee houses, where a lot of politics and other contentious issues were discussed. I have no idea of this is true, but it seems like the litmus test that drinking coffee and tea became in the 60s(?) might benefit from a course adjustment, in light of the new research and the suicide problem in Utah.