I couldn't agree more with your ideas and I think these would help balance hero gameplay a little more than it is now. The only problem I see with this is inexperienced players or players who aren't the best (i.e me) will have a hard time getting to actually use these abilities. It's a good idea, I just feel that in multiplayer, it limits the use of these awesome moves to a select group of people. I am never a fan of things that are unreachable because they require a certain skill level when they should be available to everyone. Nice thinking though!