Sure building spam might be a personal problem of mine, can't say I've seen other people talk about it, but that was my opinion on the situation so. And my main problem with building spam is that it's just mindless busywork you need to do on every planet every time you get one. It's micro heavy and annoying, to me at least, and makes me play tall way more than wide cause I end up not wanting to deal with all that.
Doomstacks are also a problem, but I kinda feel like that is unrelated to the discussion at hand.
And yes, me modding in more building slots does indeed make building spam a bigger issue than in base game, but as is it's the easiest way of uncoupling planet scaling from building slots and putting it instead into planet size, which is in my opinion how it always should be.
I'd also argue, the new system has made building slots more valuable as now they serve a better purpose than "give X amount of jobs". This does slightly hinge on the condition that they do add more buildings and effects as the betas continue, and my understanding is that this is the plan.
Can't really comment that much on the local shortage/logistics system as it's utterly broken at the moment, and I could see that give some grief later on, but cross that line when we get there. I don't think it'll have that big of a effect though, just makes it necessary to build at least some trade zones instead of the none that are needed currently.
To be fair, I’ve read it twice now. I don’t know if this borders too much on personal critique—if so, I’m sorry—but I want to argue on behalf of people who perceive the same problem:
There are automations that work quite well. The gameplay loop doesn’t have much else to do. Things that can’t be automated are warfare (though you can partially automate it with vassals, allies, and follow commands), diplomacy, and... I don’t know, I think everything else can be automated now.
I see this as part of the problem: making the building system more streamlined takes away the last thing I personally find fun—automating planets and manually adjusting them from time to time. Empire management overall works really well for me. Modifying it just for the sake of change, into a system I’ve tested and perceived as worse than before, is quite sad to me.
And I can think of better solutions off the top of my head than the district/zones/building system we now have in the beta.