Monolith Soft has been having a really good run for the last few years. The company keeps expanding due to the number of projects they're working on, and the success they've had.
At the end of 2019, the company had 236 employees in its ranks. That would be 12 more employees than they had in Sept. 2019. We already know they're working on the Zelda series and the remake of Xenoblade Chronicles, and there's no doubt something else is in the works too. It's easy to see why they need so many employees!