I am a DM and Amex Platinum. I am thinking of switching from Delta SM to the Alaska Mileage Plan and wondering if any others could help me work through this a little. I know they will match me to their second tier, which is fine. I am sure I will easily surpass their top tier in a year (MVP75K). I will be a DM for 2014 (and have been since its inception). Alaska has several good partners, including KLM, Korean Air, Delta, Cathay, AA, and more. I typically fly twice a year each to Botswana (SDF ATL JNB GBE), Philippines (SDF ATL ICN CEB), Trinidad (SDF IAH POS), and Zagreb (SDF DTW CDG ZAG). I have a few domestic flights too. Most of the time I can stay on Skyteam. With the changes (devalue) to Korean Air elite miles I will have to find a different route to Asia (and stay on Delta). But, Alaska doesn't discount miles on KE as badly as the DE/KE relationship next year. I am thinking (way ahead to 2015, since I am fine for 2014) I could use my Alaska FF number and still get access to lounges (Amex) and better flights, early boarding, etc. as an elite Alaska member, while still using Delta or AA (since they are a partner). I might be able to still use KE and KLM as an elite Alaska member (and get elite miles that they no longer give to Delta members) or switch to Cathay on some of my long legs. What am I missing here? Other than my quest to million miler (maybe two years away), why should I do this? Or shouldn't? Thanks for your comments.