Amount of villagers on a build

I would love to have the option to choose how many villagers work on a specific task or structure. This in order to be able to construct more buildings at the same time.

At the moment when you want to build something al available villagers will start the task. Which sometimes means getting in the way of other villagers or removing stuff that they still need. Also waiting to do a task because another villager has to do his task first (like say you wanna remove some blocks but the villager is waiting for another villager to remove his block before the other villager can do his) could be avoided.

Now i hear you say just block a certain number of villagers from building or mining, but that still leaves them to build a project with all available and takes away the ability to build multible things at the same time.