What an advice for a
survival game! As if you had told someone playing an RGP that he should just reload until the dice throw come out the way he wants. :crushed:
But back to topic. tldr; The balance only for scavenger might be askew in late game, not the game generally
I really can't judge if the balance is wrong in end game because I haven't played a SP in A16 long enough, but I had an idea why it might be looking unbalanced only for some after talking to the builder player in my group who didn't have problems with the weekly rebuild:
If you are a scrounging player, you have a field day for the first few weeks as you find better weapons, armour, recipes. Usually (in vanilla at least) after 3 to 4 weeks you have nearly everything (and any holes plugged by the trader). Later weeks are dominated by just replenishing ammo and repairing your base which is 80% things you don't really want to do on that scale. Even scavenging becomes stale as you concentrate on brass and ammunition and most other stuff is useless.
A builder/digger hasn't the same problems, his art is relevant the whole time, he doesn't mind (as much) the repair grind or the hunt for underground ore veins.
I might also have a solution: There should be an alloy or plastic that can only be extracted in small amounts from household appliances (making kitchens great again ;-). For unknown reasons (or just because it is especially sturdy) zombies can't get through that stuff as easy as even through steel. With that material you can build spikes that don't make more damage, maybe even less, but the spikes last 10 times longer. Maybe blocks can be upgraded too
A scavenger should be able to get the material for maybe 10 spikes or 2 blocks in a week. Not enough to replace the miners work but enough so his scavenging gets him more time away from the building/mining stuff he doesn't like that much.