Hopefully that's a clue to new two-seaters that we can expect to get in the future!
I may be in the minority, but I think all new planes that are added to WOFF should also be flyable by the player, and not only AI. Two-seaters shouldn't be treated differently from fighters. After all, the air war was all about the two-seaters doing their job. The fighters existed only to help or hinder them.
However, if it comes down to a choice between having a new AI-only plane or no new plane at all, the first option would be preferable. But I do hope the devs keep following their practice of having all new WOFF planes flyable also by the player.