I loved that in the old "learn" tab, you could click the portraits of the heroes and listen to their lines. Some of the pre-rendered animation loops weren't perfect, but I just felt that this was such a nice introduction to the heroes in the game, without going into great detail.

When I just got the beta the portrait animations were a lot bigger and I remember clicking away at all the heroes and just admiring the design and the voice work. Maybe there is somewhere this sort of feature could be reintroduced?