I know that development limits for ED prevents them from modeling 2-seaters(but i can always dream... ). But if you really want to fly 2-seaters, check out Fighter Ops. You can fly the F-15C, F-15E(my favorite of all time), F-16C, F-16D(2-seater), and the A-10. This should help satisfy those wanting 2-seaters.
ED CAN develop 2 seaters as flyable there is a mod that as much as proves it by making a flyable Su-27UB. The problem is resources.
My problem with fighter ops is that if and when it ever gets released it isn't planned to have any oposition aircraft and the flyables selection although large is narrow. I think it would have been better if instead of making five USAF fighters three of which are multirole, if they had made two USAF fighters and one or two Navy fighters for example the F-15E, F-15C, F/A-18A/B/C, A-10. This way you get one multirole USAF fighter and one multirole Navy fighter and a ground attack aircraft. The F-14A/B/D would be so great I don't even want to mention it as yet another great sim withought it might drive me mad. An opposition aircraft such as a Mirage III/2000, Mig-23/25/29 or an Su-30 would make adversarial multiplayer come alive.
I am not saying I won't buy fighter ops if and when it comes out but the choice of flyables is disapointing to me. Anyone know if jet thunders Pucara has two seats flyable?