Taken from my comments in the Stats discussion thread:

"... maybe a way for you to keep track of how a deck is doing. Such as wins - loses. Maybe add a versus what type of decks. And if you won 2 games to 1 or such. Would be a great way to track how a deck is doing and how it does against certain decks. Maybe add a graph of sorts for these. Win percentage and straight wins to losses by match and by game."

- Ability to add opponents name, deck colors, and some notes

- Opponent deck trending? (like what colors, decks or cards they use most often) Not sure if this is worth it but I figured I'd add it anyway.

* Feel free to add more info spots or anything else relevant you can think of.