Forgot to mention - the voice over for Yak aircraft says [Jack] instead of [Yuck] but I know it's minor and you probably wouldn't want to rerecord the file again
Trainers are not as popular as fighters, duh?! Now go to MP aerobatic server or virtual air shows and tell them all "the effect is not good"
No, it was not a mistake. It was opportunity to simulate Yak-52 (they have already made it for professional client) and they went for it. Those who found it interesting or liked the aircraft have bought the module and had fun with it. Your failure does not imply that DCS failed with anything. You're just trolling at this point. We do have a few trainers and there even was another one (PC-9/A) WIP but unfortunately they stopped the development.
Again, they provide the aicraft simulation. What you do with it is your own business. Yes, you can also learn how to fly but if you expect some kind of flying school from DCS developer, you're in for the disappointment.
They all have four working wires.
CQ module is kind of overboard to ask for. It should be part of SC module. Just an option for different crew behavior.