It would be nice to add a 'Tree Log Pile' construction in the game, where you can carry tree logs into. Just like 'put in cart' ability, where you carry a log, and then place in there, instead of using lot of time to stack.
Suggestions could be different sizes:
Small log pile: use 1 tile and can carry 15 logs
Medium log pile: uses 2 tiles and can carry: 40
Large log pile: uses 4 tiles and can carry: 200
It could also be implemented into the sawmill, that you guys had in mind previously. So that you can stack tree logs into the sawmill that can contain 200-500 logs.