The simple level stab is probably a similar amount of programming, because
a) there is none currently implemented and
b) the one from previous IL2 can't be simply copied over because CoD is written in a different programming language.
What i'm trying to say is, if they spend time to make something like this, at least try to make it look semi-realistic. Not to mention that CoD already has similar code implemented: they would only have to modify the existing code that is used for the luftwaffe autopilots.
P.S No accusations made here, just a suggestion. Hope we get to fly some Blenheims on ATAG soon