I agree. Last hitting has nothing to do with spectator enjoyment. The whole concept of last hitting is awful (as is Kills/Deaths/Assists) but being one of the primary sources of skill, it has to be replaced with something. At least blizzard realized that and implemented the globes, but only time will tell if that's a solid solution or not.
Also the inclusion of dedicated healers/support heroes as well as not all heroes being solely focused on hero killing means that hero fights will last longer, be much cleaner, and more enjoyable to watch.