Corel released the final version of Aftershot Pro 1.0.1 that has support for the new 5D3. So another choice to process your 5D3 CR2 files. I already gave it a trial today and it worked like expected.
Just to let the german readers know... Canon started to deliver the 5D3 here. My local dealer told me by mail they will arrive beginning of next week and called me a little bit later to tell me they already received a few. I picked up mine some hours ago.