Hoping to get some advice on the best solution to whether to switch from AA to BA mileage program and when to switch..

Recently changed jobs and country (USA to UK) and now flying much more than previously.
Currently I have around 60k AA miles, gained when booking return flight to the UK and while in the US.

New job means that most of my flights are European based, however all have to be booked through BA. Long distance travel is limited going forward.

My current miles goal is to take the family back to the US for a holiday (or at least get to 80k AA miles for 2x off peak AA trips and fund 2 more tickets myself).
This seemed quite simple as I could just use the BA flights and collect the code share miles with AA, and get the elite status with AA (proposed trips leave me on the cusp)

However the elite status has changed for AA and I must fly 4 AA segments as opposed to flying BA and transferring the segments and therefore I am wondering if I should switch to directly collecting BA miles?

I am on the border for reaching AA or BA elite status with the amount of travelling I am doing.

My current thought process was to stick with AA and get to 80k miles, accept I might do enough segments for elite with AA, but not meet the min 4 segments. And then once I have the 80k miles with AA switch to BA.

Then when I book my USA trip I book 2 reward tickets on an AA flight, and then buy 2 tickets on the same flight using my BA account and start gaining BA miles (plus a nice starting chunk for the transatlantic flight).

If it looks like I won’t reach elite, am I best just to keep collecting AA?

Any other options? Or better solutions? Do I switch immediately and start to build BA miles?

Many thanks in advance for thoughts.