The new system is fine, but my biggest concern, is that I am unable to see what my allies and enemies have picked, or moused over while I am in Grid View. Not sure if this is a Non-widescreen issue since I'm on a 1280x1024 monitor.

Another minor thing, is that when using the scrolling card view and stop to read about a hero, you will have the greyed out icon for them in the team composition window, generally suggesting you are going to play them.