I don't remember why palisades have a cooldown on repairing, probably a bandaid fix to an issue with a previous siege system. Either way, I think it could be cool if you could repair them with multiple blocks per cooldown. For example if you've 1 block in your inventory it uses that one block, repairs 250 damage, then the repair cooldown begins. If you've 2 or more blocks in your inventory, it uses them to repair the wall sequentially with the same player action before the cooldown begins whenever the repair action ends.
Minor, but it'd be nice to not have to use a bot to click on every wall segment to tell what's been damage every few hours and instead just repair it al at once, while maintaining the only repair once at a time functionality that's already there if it's important for something.