My Wishlist for North African campaign...
1. Separate Italian and German cores and prestige banks
2. Italian core begins first, without Fritz, in 1940 in Egypt. I suppose you could actually start even earlier. Or built up some experience before WW2 by fighting in Ethiopia or against the native in Libya. Or, some of the units that made it eventually to Africa participated in the attack on France. It could be worked in, but not five missions!!!

Like one.

I really liked what Nivadid (don't remember how he spelled it - sorry!) revised the African campaign to add Italians to it so they'd build some experience and not totally suck by the time Rommel showed up
3. German units in N. Africa were not green troops! So maybe allow (optional) import of some of your 1940 core troops. Like in GC 42/43 West, where you were only allowed x-number of units, perhaps you get x-number of cores slots that you can import. Perhaps limit how many heroes you can take with you too. Like one per unit maybe. After all, the 5. Light Division was formed mainly around a chunk of the 3. Panzer Division, not raw recruits.
4. A fictional path is fine, but draw out the historical path more. Break up the battles or parts of the battles, especially after 2nd Battle of El Alamein. Smaller scenarios that cover their retreat from Egypt all the way to Tunisia. A lot of historical ideas especially come to mind when thinking of a British campaign, but that's off topic for right now.
5.Naval/Air scenario around the convoy supply issue and suppression of Malta come to mind. If you successfully guide/defend a convoy of supply ships from Italy to Tripoli, you get some kind of special bonus or additional core slots, prestige, or whatever! If you don't, then they're some sort of penalty to reflect the fact that your forces received insufficient fuel, ammo, and other material.
6. There's GOT TO BE a buff Hans-Joachim Marseille special hero! I mean c'mon!
7. Okay, this one is not historical, but we want a longer campaign so we'll make an exception for this one. You are able to disobey orders and withdrawal your troops from Africa to Sicily like Rommel wanted to do, instead of reinforce a defeat like Hitler ended up doing. Maybe this is optional? Massive prestige sink anyone? Then campaign continues with the invasion of Sicily and mainland Italy. After all, you're still facing the 8th Army (along with the Americans.)
8.Your core stays in Italy until the end of the war, unlike in GC WEST.
Thoughts?