You know, I might actually play Dota 2 if it became a third-person shooter.
We probably shouldn't expect Valve to ever sign off on dropping Dota 2 into a completely new genre, but modder BMD_ has done it for them.
BMD_ even pulled it off by using the actual Dota 2 tools and game engine, as he told reddit.
"I did completely blow away and recreate my own keyboard/mouse control system instead of using the built in Dota controls. I created my own system of motion that allows me do to things like have characters jump and strafe, and turn at an infinite rate. In fact, no unit orders are given at all in the game, nor are any hero abilities or items used. This library has been made available for anyone to use in their mod, and you can see some examples of it in action at https://www.youtube.com/watch?v=AxBxQI....
The camera controls are extremely hacked-in (but functional), and you can probably see in the video that each player has to select a flying enigma unit at the start which I detect and then use as the object to point the camera at. There is no facility currently available for me to manually reposition the camera except by locking the camera to the created "camera" unit, which results in some unfortunate limitations."
The modder plans to release everything he's built so other people can use it in the future too.