Basically every airline offers the same terms, conditions and services. If you want to know what's coming industry-wide in 3 years, just keep an eye on what the most regressive is doing today.
(As a customer, I only care about stuff that actually affects me. Checking what's written in the contracts and official terms-and-conditions is at best a means to an end; especially since I am unlikely to go out and actually sue anyone. Mostly, I'll just avoid airline X, if I hear that other people are having trouble with them.)
BA is a perfect example - a few years ago it was an OK airline, but it has chased the policies of RyanAir (even hiring their CEO!) to the point where they are a complete shit show.
You’re pretending there is a market where consumers have input where no such thing exists.
If I don't like the Cheeseburger at McDonald's, I just go eat elsewhere. No need to regulate the taste of cheeseburgers, nor exactly how many pickles or what kind of cheese should be on them.
You'd do the same with airline contracts. And people already do that, for the all the conditions that are not regulated.