The fact that you have to drag the equipment on to the board doesn't add anything fun. The fact that miners will be greedy with the upgraded equipment makes it actively unfun.
That's easier said than done. When there's more than two or three of them they're always running around, and because of the perspective I've accidentally upgraded one that was standing a bit in front of my intended target more than once. Drag & drop is a mild improvement over "throw it on the ground and hope for the best", but much less fun than automatically equipping the miners that need it.