Sorry if this has already been suggested, and I just haven't seen it.
One of my favorite parts of TCGs has always been the artwork on the cards. I can't count the number of hours I've spent browsing through my MTG and WOW cards, just admiring the artwork. It's already quite obvious that the artwork for IW is going to be amazing, but I'm starting to notice a problem. A lot of that beautiful artwork is being covered up with text for powers and explanations. Patient Zero is a prime example, having half of the art covered with text.
So, I was thinking that it would be nice if there was an art gallery section somewhere in the game. This section would be filled with just the artwork portion of the cards that you have collected. Obviously, there are probably more important things that need to be addressed pre-launch, and probably for a bit after launch, but I was thinking that this would be a very nice feature for down the road, when the dust has settled a bit.