I'm glad this thread was open. I have the same concerns as the OP does. But I find some of the viewpoints in this thread to be flawed in my opinion. The argument that these units are purely cosmetic and don't effect the gameplay just rubs me the wrong way. Immersion is very important when it come to games like this. For some players these units are completely unnecessary, while others can't get enough of them and it adds to their immersion and flavor. But if you go with the "cosmetic stuff doesn't really matter" argument then where do you draw that line? Loading screens don't matter? I mean you could play the game perfectly well without having to look at beautiful art while you're waiting for the game to load, right? A shiny new user interface doesn't matter as long as you can click where you need to click, right? And that's not to say anything about having a beautiful map to look at. Cosmetic details are and always will be important.
Another viewpoint is saying that PDS could have charged $50 for the base game+extra unit models and we wouldn't be talking about this at all. I think if they had done that we would have 20 threads open with people complaining about the increased cost for a Paradox game and asking why they have to wait so long for a game and pay extra for all that waiting. It's hard to believe there wouldn't be at least some dissent on the subject.
@Liely1710, You bring up the point that they could have released the game at the first release date. But based on what people said about the game during the multiplayer event 6 months after the first release date, the reviews would have been terrible and while PDS would have benefited in the short term with it's sales, it would have hurt them(And us) in the long run.
I think this day 1 DLC(Lets face it guys, that's what this is) will at the very least slightly hurt Paradox in their future endeavors. If say two years from now they have a highly anticipated game in development and for one reason or another it gets delayed, instead of people thinking that the guys over there are working like busy little bees trying to get the game out the door and adding a crap ton of new things to the game, they might think that half of the devs are instead building extra content for the first few DLC's to sell to customers further down the line.
I would have liked to see the unit models be part of the base game they were made for or at most be an incentive to preorder the game. When you preorder a game, you are essentially saying that you trust the company to provide a good product and you are willing to go out on a limb and pay first based on that trust. But to pay first and and pay extra for unit models made while the game was in delayed development is just heartbreaking for me.