My thoughts from vs mode...

The good:
-Maps are both a good length, the 1st map in CC is roughly the same length of a 3rd map in a 5 map campaign, the second map was a little shorter but not overly so.
-Good map layout for the infected, a few rooftops blocked off from their use, but so far nothing gamebreaking. Lots of great pull/pounce/boom spots. There might be as many good infected ambush spots on map1 as in the entire nm campaign combined.
-Multiple paths that really aren't multiple paths. The main path through most of the campaign is outdoors, but the survivors have the option to travel through buildings adjoining their "main path" for better cover. I didnt see randomized car alarms or pathings, just lots of walls that can be knocked out by the infected, and car alarms dont have telltale signs this time around, but it was the same cars both times through the campaign.

The bad:
-Way the hell to many weapons/item drops. Even with medpacks off there is still way to much stuff, 6 different T2 weapons spawned on each map, pistols galore. Propane tanks/gas cans are in abundance along with mollys and pipes, this will most defintely need to be tweaked. Playing with medpacks off was a nice challenge, but still far to many other pickup items.
-The end event while having a nice added mechanic forcing the survivors to restart it, has without question the best survivor camping location ever created for a crescendo. Once people realize to take the tank around the backside in the windows behind the MG it will get better, but it's still super-rough for the infected to do much there.

The funny/ugly:
-If you played WoW before you have heard this line before, but dont stand in the fire! The crescendo event on map1 creates a fire while the event is active, stand in it and the survivors die almost instantly.
-The quanity of weapon drops! I know I said this before, but it's so horrible it bears repeating. There are far to many locations for weapons to spawn, and so far they seem to always spawn in every location. This might be a bug, but it might be intentional, it's terrible either way and needs to be fixed.
-The first map gives a 1.0 modifier, i forgot to take notice of the second maps modifier, but it should also be 1 if it isnt.

Overal it was fun, it was nice to see some life breathed back into L$D, but no way you will convince me that Crash Course took 5 months to make.