I have no idea when the new one will be available, but the test version will surely be ready within February.
I am quite happy of the compromise between level of detail and performance at the moment - on my system it is slightly "heavier" (in terms of fps) than the previous model... but not that much. Fair trade, IMHO, if you consider how good the new mesh looks.
Cockpit will be almost the same as the previous version - just minor tweaks here and there. I am considering to remove the "full (half) screen" radar mode as it seems to have several bugs due to the way it is implemented. Removing it will help the perfomance a bit... I am not sure.
Flight model will not change.
I am also considering to add the F-35B and F-35C to the package.
If so, the F-35B will be uncapable of VTOL operations (will only support STOL slow-speed mode...I think it is called "mode 3" on the real thing but I may be wrong).
In terms of pricing, it will depend on the features... for sure it will not be expensive and it will be close to the previous version. Few Euros/Dollars more if all three models are included... or a few less if it will have only the F-35A.