Latias is a fantastic Pokemon in this metagame. It is one of the few offensive checks to Scarf Keldeo and is a great "sponge" in general. It covers a ton of threats in this metagame, and I find myself hard pressed to not use it on most of my teams. Its general usefulness vs so many playstyles cannot be emphasized enough, and I would argue that its LO tank set is its best set atm. It serves as a bulky pivot that can take hits from a lot of the metagame, but still hits pretty hard. I find it difficult to successfully run CM sets in this metagame, and while choiced sets have some surprise factor, thats pretty much all they have going for them barring maybe Healing Wish. If Latias didn't get Healing Wish there would be almost no reason to run it over Latios on a choiced set.