Well, sorry for having been so slow, but here I am, with the 39 campaign finished (I'll be away for a few days, so I doubt I will be able to significantly test the 40 campaign before the DLC is out, my apologies for that). I did give my feedback in the particular scenario threads, but here is my recap.
I have already said this, but I'll say it again, that campaign is a masterpiece, because, within the boundaries of the "simple" mechanics of the original game and of existing assets, the map design, scripts, creative objectives, diversified situations are used with a creativity that bring the game to another level. Unlike the relatively static model of the original game scenarios (variations on the "plod through the map from objective to objective"), each scenario feels and plays completely different : you'll have to plan according to the game briefing, react on the fly to unexpected situations like enemies counterattacks, solve different problems. Which brings a level of immersion completely but pleasantly unsuspected. I loved the fact that DV were tied to additional objectives, not the turn counter.
Let's go with a quick recap of my campaign (more details in the specific threads). I played the campaign on the colonel setting, like I did in the original game - which is sufficient for me

Scenarios up to Modlin included were beta1, others were beta2. Yeah I know, I have been that slow ! Every scenario was a DV except Spoils of Wars (on the way to DV, probably, but reload/skipped due to losses).
- Poznan : good blietzkrieg scenario, the element of surprise is nicely simulated by units with no supplies and ammo.
- Danzig corridor (south) : even better, because of the nasty and unsuspected counterattack on the Vistula bridges. The urgency of the Blietzkrieg is represented by the relative ease of the first turns against unprepared enemies and the comparative difficulty of the following counterattack. The drive to strike hard and fast is led by actual gameplays elements, not an abstract turn counter.
- Lodz : a rescue mission, an encirclement manoeuver (as advised in the briefing), and foreshadowing of the next scenario. Perfect exemple of the innovative new design of this DLC.
- Piatek : a balanced, though but fair defense mission in the early days of the war. A bit iffy on the bridge defense issue though (baiting units by abandoning the bridges to crush them with the river penalty plays a bit weird)
- Kampinoska Forest : another one with a completely new objective, defeat the trains. The terrain is the actual enemy !
- Modlin Fort : decent one, this armored train is scary
- Warsaw (south) : long, taxing, exhausting scenario (not a critisim

). The sprawling city area where you fight like city block by city block is very impressive. I can only imagine how those iconic city battles in the Russian campagin will be like ! The artillery capture objective give some diversity to the scenario
- Spoils of Wars : will not rehash my critisism. Seems a good one for those up to the challenge, skippable for the others, which is OK
- Oslo : another nice one with an amphibious assault, a fortress to crack, a distinctive geography, and an iconic secondary obective.
- Lillehammer : easy but enjoyable, with weather playing a role, a good introductory scenario for the east front campaign
- Narvik : a crowning scenario for a great campaign, a bit reminiscent of the (great) original campaign scenario. Each and every gameplay element is added to the mix : a lot of naval action, decent air battles all supporting ground assault, isolated auxilliaries in advanced position, significant weather, and a big multi hex fortified town to crack at the end. Masterful !
Thanks for having me on board for the beta testing process, and I hope the release will find a deserved success.