Yea, of the players who made characters so far for my epic game, 2 out of 3 of them had all their artifacts be cosmic powers. To be honest, while they are strong powers chosen, (Cosmic Toughness was one, everyone took at least Legendary (prime attribute) I think the reason they were chosen is so that they wouldn't have to wade through 200+ divine abilities and end up picking ones that only really have RP applications. One of them did take Theopoea, but only because, as a god of Fire, Fire, and also Fire (did I mention Fire?) Lava Golems make great guardians. (Greater Stone Golems + Fire Healing & a Fiery slam attack)
Overall, I am surprised that no one has (yet; one player still needs to make a character) picked a Cosmic Effect. (Though one has Uncanny Divine Mastery) I guess it is because, as Lesser Deities, they don't have enough HD to do anything meaningful with the Strike/Storm powers.
Though their choice of powers makes it a bit tricky to plan encounters (Curse you Abrogate!
) they don't seem to have picked anything that makes them unstoppable. (For now...)