Try the Men of War series or Blitzkrieg 3 then.
I actually understand where you are coming from, because, as I have stated above, the only interesting and playable part of HoI3 was the (land) warfare. However, the HoI-series has always been about so much more than just the combat. It is supposed to be a grand strategy game and focussing too much on warfare takes time away from managing your country through the given amount of time. In DD 1 it was stated that one of the goals of HoI4 was to make the player consider different things than just the plain warfare to control the fate of the country. I wouldn't categorically oppose an OOB, the question is, whether a simpler, off the map version of an OOB has much to do with an OOB.
I think Paradox is doing a lot of things right with HoI4 that were messed up with HoI3. HoI3 attracted many new players that liked the warfare aspect of the game, at the same time it drove away many longtime fans of the HoI series because it was too one dimensional (and terribly buggy). HoI4 will certainly discourage some players that liked the way HoI3 was designed and while I feel sorry for those, I am certain it will attract many new (or even veteran) players that like to focus on all the things that were important from 1936-1949.
Besides all that, HoI4 will probably get the same kind of attention and post-release development that CK2 and EU4 are getting. So there will be a lot of DLC and maybe one introduces an OOB if it is not implemented into vanilla. For those of you crying foul now, because "if they put it in a DLC, then they could have put it in the original game", I actually don't want to talk to you, but rest assured that an OOB probably requires a lot of development time. And that time is pretty sparse for a new project that has to rework so many features since they were simply unappealing in HoI3. There is also a diabolic rule of thumb: The more people buy the vanilla game, the more time and money PDS is probably willing to invest into making popular DLC.