I have been an AA Executive Platinum for as long as I can remember, but my circumstances have changed so need advice as to whether it's worth beginning to credit my miles to BA.

I am a US citizen, but currently am based in Abu Dhabi. I've gone from being a 125,000-mile-per-year flyer to a 250,000-mile per year flyer, and whereas in the past I had a lot of US domestic travel on AA, now the vast majority of my travel (about 10x per year) is on BA to the US via LHR on I-inventory Club World fares.

With my AA Executive Platinum status, I do of course get unlimited free Y-to-J domestic upgrades when traveling on AA in the US, but as noted, my US domestic travel is down significantly. I also get more AA VIP upgrades than I can use, although I am on occasion able to upgrade from J to F on AA when connecting through LHR. (Whereas most of my travel is AUH-BA-LHR-BA-BOS, I will sometimes connect on AA to DFW, JFK or MIA and upgrade to F.) With BA Gold, I know I would get AA lounge access when traveling domestically in the US, which I now get through my AA credit card.

To throw a wrench into the works, I may start flying more to the US west coast, and although the total travel time is longer, will consider flying CX from DXB through HKG for a change of scenery, and because I so much prefer CX to BA.

In terms of miles/avios usage, I generally use them to fly family and friends to visit me in Abu Dhabi, London or Europe, avoiding BA whenever possible to avoid the BA surcharges.

So with all of this, is there any reason for me to consider qualifying for BA Gold rather than AA Executive Platinum. If I can qualify for both, should I consider doing that?