Have been beta testing the new 2.12 campaign code and all I can say is, if you have never tried the Luftwaffe commander level campaign before, patch 2.12 will be your reason to come back and give it a try!!
The BOBII campaign engine is amazing in its dynamic nature and the amount of control it gives the player over the strategy of the Battle of Britain air forces.
The Luftwaffe campaign has always been doubly challenging - partly because of the general strategic objectives of the campaign which were very ambitious (bring the RAF to its knees) and partly because the original designers, Rowan, decided for whatever reason that would introduce a 'margin of error' into the ability of Luftwaffe escorts to successfully accompany their bombers to the target. While it was true that in 1940 it was often the case that bombers and escorts failed to meet up correctly, and many raids were conducted without escort, it was a bit of a gameplay destroyer for the Luftwaffe commander. And try as we might, the BDG could not track down where in the code Rowan had hidden this little foible.
Also, the Luftwaffe commander had huge resources at his command - fighter, bomber, dive bomber, heavy fighter - but a lack of detailed information on their current state of readiness meant his ability to use those resources widely was limited by a lack of information about their current state. Were they available, and if not, were they refuelling, out of action due to losses, non operational to low morale? It was all a bit of a black hole.
Well, all that has changed!
Pick your target: Tangmere station - home to three RAF squadrons
Assign your raid: 1 gruppe Do17s and 2 gruppen Bf109s in escort, split 35% attached, 35% free and 35% return (ie meet the bombers over the channel on their way back). You can determine the mix. And this is what you see now:

All escorts performing as they should
And on big raids, deep into Group 11 territory this is critical if the bombers are to make it to target. EG this raid on Biggin Hill with 75% free and 25% return escorts



On top of this the LW commander has been given unparalled access to information about his own units in the strategic reporting system
Here you can see exactly which fighter units flew in those raids. The brackets indicate they are refuelling and not available, while the clear units are available for further raids. If the units are down due to losses or morale, that will be shown too.

If you haven't tried the feast of campaigning which is the BOBII campaign, and especially the Luftwaffe campaign, get ready!!