If they were going to introduce the Yak-1, they would have done so with the recent Yak update. I don't understand why the Yak-1 would be desperately needed. The Yak-7 was a two seat derivative of the I-26, which was the prototype of the Yak-1. In terms of performance, the current Yak-7 is very similar to the Yak-1. It has a second MG, so is better armed (not much better). Easy to create, so there's not the labor of a new plane. Still, little different from the Yak-7....
TBD... Sure, it was significant in the first 6 months of the war. Just remember that the TBF was used at Midway too (and fared no better than the TBD). Aside from occasional scenarios, this will be the Queen Bee of Hanger Queens. Almost no bang for the programming buck..
I don't believe that we will see either any time soon, if ever.
They might lack the flight-test data to model the Yak-1, or it might be more difficult to obtain or to implement than just copying the Yak-7b with minor modifications.
I'm not sure if the Yak-7b is close to the Yak-1, but in scenarios, we like if possible to have the planes that were there. 80% of fighting in WWII in Europe was Germany vs. the Soviets, but we don't have some of the main Soviet fighters from 1941 to 1943, the Yak-1 being one of them. It's why we wanted the He 111 for Battle of Britain, and why we want the TBD as well. For two of the most-important naval battles of WWII -- Coral Sea and Midway -- the TBD was the US torpedo bomber.
Bang for the programming buck depends. For people who don't care about any special events, yes, anything involving special events has no bang for the buck. But special events are very important to a significant number of people, not just for scenarios, but for FSO's (which has a large draw), This Day in WWII, SEC's, Snapshots, etc.
My feeling is that HTC does over time want to fill out plane sets for special events, or we wouldn't have the G4M, He 111, P-39, P-40, B5N, D3A, Ju 87, B-25, etc., and maybe not the Bf 109E, Spit I, Hurri I, C.202, A6M2, etc. as well. I'd bet that we do eventually get the Yak-1 and TBD.
