There are two things here, what I want, and what makes sense for AA to implement so as to attract paying customers.

Personally, I don't care about the Flagship Dining.
I value more:
Uncrowded and dedicated check-in (when visas need to be checked or when checking bags)
An uncrowded lounge.
Dedicated line for boarding that can be used ANY TIME (not just at start of boarding and then the area just gets mobbed with all pax),
Consistent good service from FAs
Of course, a comfortable seat. I think the current AA J seat variants are good overall. Hopefully new aircraft does not have those awful J seats with tiny footwells that make for a super uncomfortable sleep.(hello Delta).

Food and wine list are not going to swing the scale towards AA for me. It is still going to be mediocre food and wine.

See, I don't ask for much.
Unfortunately, AA fails in many of the simple things mentioned above.