My problem with wall costs is mostly for the home base setup. I am doing like 4 and 5 runs of max resources to fortify just one area. A big problem is that I do not know what to expect. Maybe I am overbuilding, maybe I am not building enough.
Right now I am building up a bunch of defenses for the very first shield expansion in pinkerton. Am I going overboard? Is it going to be like shield mission 1 on the first area or is it going to be closer to shield mission 6 on the first area? Who knows?!
Also, apparently, rusty parts do not drop very much, if at all in pinkerton. The really need to address the problem of resource tiers. It just doesn’t work right now. So now I need to go to the first area to farm rusty parts, which is dumb.
I am getting tired of the grindy ness even though I love the core game idea.
I think maybe a better system is that in a given tier, the old resources drop at the same rate as previous tier, but there is a new resource that will be needed for tier + 1 stuff. Tier 2 traps still need the same rusty parts as tier 1, but also need 1 regular, non-rusty part as well.