I'm a complete data nerd, so I don't know if others would be as excited as I would be to have access to more data. Would anyone else out there like more data available, and what would you want? Some examples from my wish list (and I don't know how feasible each of these would be): What are my MP records against particular opponents? Against different mixes of classes? What is my win rate on different scenarios? What is the average rate across all players? What percent of players own a particular item? Of those who own it, what percent use it in their most recent build (split by MP and campaign)? I'd love to be able to export my list of all items to a spreadsheet (including rows for items I don't own, so I can know how much I'm missing). It would be neat to be able to look at other players' builds, though I'd worry about MP exploits using scripts to give real-time info on what is left in opponents' decks.
"Stats" often aren't "really needed," but games are giving more and more of them. It could be a nice feature to consider sometime when they need more perks. ("Now, for you stats junkies, we've implemented such-and-such! Come play more and see!") The ability to export an item list sounds VERY useful. Whether it should be a "collector's list," exposing every item in the game whether the player wants that or not, is debatable.
The only nice thing I want is win rate stats for certain map (scenario). Everything else has too much variable to be of value. You can do it right now if you pay attention. Every card enemy played will display the item associated with it. Knowing the item, you can deduct their deck easily and guess what is coming up next.