Ok, 1) Same levels of exp? I don't know. Already good enough and will get better is my "point".
2) If you don't bomb the Red AF, then no loss of morale for this reason, still lose the air battles as they try to intercept your ground support and unit bombing. I would guess overall less of a hit to Red AF morale.
3) Yes, most ground attacks do not need air support, less true now than in the past. Lvov pocket has become a more difficult proposition. My own personal style is to take Lvov and begin the reduction of the Lvov pocket even before it is formed ( all the units you rout T1 in the coming Lvov pocket stay in the geography of the pocket, the ones that don't recover their morale will surrender before axis t2. This requires a substantial diversion of force that many players use for making the pocket first. I can do both, kinda anyway, bombing the stubborn (high morale/cv) Red units in the South makes it a little easier, especially true of the low morale ones that you want to rout.
4) Red AF is ineffective, demoralized or not, besides the morale recovers quickly at NR, exp not so much, I ALWAYS provide proper escort, all missions on manual. Yes sometimes the ai will send unescorted bombers on ground support, nothing I can do about this. Even crappy planes and crappy pilots can wipe this out, so put Red AF out there, mostly fighters.
5) Trucks, not a problem moving your abs forward per losing trucks. Operating in bad weather is the big truck killer. Doing lots of escorting and keeping the abs forward does use up most of the fighter miles so you won't be able to intercept Red bombing missions very well, my opinion is they can't do much of anything anyway, I don't even bother to send the flak along, somebody starts hurting me in 41 with Red AF I will change my methods.
As you must have noticed by now, lots of wild variations in the combats department, and pretty hard to be really sure about anything. Joel has said that it WAD (as designed).
In the "for what is worth" department, you can use the numeric keys to slow down or speed up the combat resolution window and watch everything that happens.