I have had the Air 2S for 4 years and still love it. I like the real 20MP sensor and 22mm equivalent camera, though it does get a bit noisy in the shadows, and you may need to swap to get good even sharpness with the wide lens. I looked at the...
As a current Mavic 4 Pro owner, I will say this:
1. Go for the AIR 3s. Best bang for your buck, no question.
2. AIR 3s is fully compatible with the Cellular Dongle 2, for 4G connection without having to roll back FW. My current Mavic 4 Pro on...
IMHO, third party batteries are really only worth considering if you cannot get new DJI batteries. Batteries are a critical component, and it's generally not something you want to cut corners on.