Hey Super! Fucking love it when people use Latias as you can probably imagine from my thread :D. Anyways, this team is super solid, and I honestly can't say anything bad about. One thing that you may consider but it's up to you, is changing Latias' role up a tiny bit by replacing Psyshock or Psychic > Substitute. Bulk Up Conkeldurr can be kind of a bitch to this team if it carries Ice Punch, and Dragon Pulse wont be able to get the job done unless you already have a few Calm Minds up. Psyshock is always recommended over Psychic for the chance to OHKO Terrakion in Sand, hitting the pink blobs hard, and winning CM wars, however Psychic OHKOs Bulk Up Conkeldurr while Psyshock doesn't do too much to it after a few Bulk Ups. Although this slightly hinders Latias' sweeping potential, it widens her opportunities to come in earlier to sweep so Chansey, Blissey, and Jellicent don't completely wall it this set to hell.
Then again, if you keep Psychic on Xatu over Heat Wave, then you shouldn't need to replace Substitute with Psyshock, so if you choose to keep Psychic on Xatu keep Substitute, but if you switch out Psychic for Heat Wave then try out Psyshock or Psychic on Latias. CM Latias with 2 attacking move is my favorite Latias set, as it worked very well on my last team. It takes a little more prediction to sweep successfully, however is provides more coverage and a way to hit special walls, allowing Latias to sweep earlier.
Anyways, great team Superpower, and good luck!