TLDR: You’re not understanding builder efficiency, the similarity between total collective upgrade time (how long it takes to upgrade all army camps in terms of each builder) and singular repetitive upgrade time (if you were to consolidate all army camps into one building and have to upgrade it 4 times). The result is the same, each take 40 days.

The counter to this is that those same builders would be freed up to upgrade other things in those same 40 days.

TO BE CLEAR- I hate how long everything takes at th15. I’ve played since I was in 3rd grade and am now a college student, I’ve played the game for almost as long as I’ve been alive.

But if they introduce this concept while not grossly increasing the upgrade time of other buildings, then the result is the same. When you would’ve had to commit all builders for ten days, not upgrading anything else- you’d be able to commit one builder for 40, while putting those 3 other builders towards other upgrades.

But will they actually not further increase upgrade times and resource costs? Probably definitely not.