Loddar, consider that in the real war there were hundreds upon hundreds of aircraft, and AH has only about 70+ or so. It is going to take some time, but more planes will be added. I think AH is comitted to rounding out the planeset as much as it can (why else is there a b5n? Why else is there an SBD? Why else have a spit1?), but it will take time.
And scenarios, historic matchups and the CT (not to mention TOD) are an important part of AH. Sure most of the players fly in the MA, but where do you think the pilots from the CT, the SEA and the TOD are going to come from? They will be pilots that also fly the MA, but want more historical set-ups.