Aha, then it's me that's getting confused, maybe 'cos this is the alpha and DCG is the beta... (the CoE beta comes with the big map, all squads, complete timetable, more aces, awards, sound packs, more skins in a separate package etc, this alpha is just to to check how it works and fill a gap...).
So maybe I should put all the links on the first page together, wasn't meant to be a real release, just a weekend filler for testing, but might make more sense.
Flight sizes are controlled individually in the timetable by squad, along with the replacement rate this controls when squads begin to appear in missions, such as Stukas should appear in strength on July 4th, JG51 has to hack it alone until the rest start coming back from refit etc, it's largely historical, if not complete in this alpha version, this one starts with low numbers and lets DCG build things up semi-randomly so there's always some variety.
Skill is also set in the timetable, so you start with experienced vets from Dunkirk and France, but quality will reduce as you go on on both sides, most replacements being green, some very green for the RAF, again historically. Overriding this in the DCG control panel should work though, but if you leave it as designed you should get a few experienced vets holding the fort and a bunch of greenies being fed in to fill the gaps. Gives plenty of opportunities for the Luftwaffe against RAF "Idiotenreihen", but they will also begin to struggle as their replacement rate was/is very low, the Luftwaffe being increasingly short of pilots and planes, more so than the RAF, although training was better, but leading Goering to issue instructions for the old hands to look after the newbies, so even in this limited alpha it's semi historical, if mostly "free DCG" for fun.
The Luftwaffe is also limited largely to the channel in the first campaign, but that changes later when they start moving further inland in the second and third, and to London in the fourth and fifth. Only has a fraction of the targets set currently, so this is mostly for just having a good fight. The RAF movements aren't in yet but will rotate historically, you may have to move them manually from up North if you're under pressure as the RAF, or the same if you're running out of targets as Luftwaffe, but DCG will handle it to some extent, though you can always push the panic button by reducing the action radius so the northern squadrons will be transferred to bases closer to the front, but watch out for overcrowded airfields if there are too many squads concentrated in the south or around Calais.
Slowdowns are the biggest problem, which cannot be DCG itself, as all it does is write missions, but if those missions (3rd party campaigns) are heavy loads then the game will let you know. Can be the map too, the Channel map is very heavy in memory, the big map is lightweight and runs faster, but depends on machine and config of course, and how many other things are running at the same time, mod-wise. You could always try it clean with nothing else running and compare, and some mods actually reduce the load, but it's still a heavy load in the first place.
So I'll put the links up in the first post...
Done, now back to the data... one day I'll actually get to play this...