Switch from American Airlines to BA?
I am moving to London January 1st and am formulating a miles and points strategy. Currently, I am Platinum (Sapphire) on American Airlines. Any advice from knowledgeable flyers or others who have made similar moves would be appreciated.
It's not clear whether I should:
(1) Stick with AA and earn points on code shares to maintain status.
(2) Switch completely to BA.
For option 1, it's unclear whether I would run into booking impediments with BA. For option 2, it's unclear how I could leverage my current Sapphire status during the transition year.
Any guidance is appreciated.