I'm not much in favor of this proposal. It is important to know the usage of a Pokémon when you have to think about the threats to your team, but when you read an analysis to decide whether or not including a Pokémon into your team, who cares where said Pokémon is placed. If I'm reading Jumpluff's analysis because I'd like to include a Subseeder, why should I be interested to its usage (pretty low, anyway)? I'd say that a tag with the tiering (like it already is) is more than enough for the analyses. When you'll need to look up for threats, you can always go to the Usage Stats thread for the current month (which DougJustDoug kindly releases every month)