I rather make them part of my town after their defeat. They could become soldiers or blacksmiths or even framers. They could train you soldiers to fight better and teach them to build certain things that are unique to Goblins.
I’m wondering if bunny men eat twice as much (vegetables) then normal men. Meaning if you live near them they might farm twice as much land. Your people will eat less or have less space to live in. And when winter comes and you can’t grow any food. They might attack you for food and water. Now trying to solve that issues in the game would be fun.