Come up with nicknames is fine, but I think it should only be done if you need it. Nicknaming something just because you can makes things needlessly complicated, and it makes the metagame look less inviting to people who are new to the general idea of a metagame for video games. I think Splatoon has a great appeal that lets it have potential to be competitive AND casual, just like Smash Bros. If we come up with quicker, logical names for things, great, but if we don't need one, we shouldn't make one.