Training dummies fire projectiles

Practice tool is a good way to practice mechanics and new combos for different champions. But one thing that would help a player as well is to add training dummies that fire projectiles at you constantly or have them move set paths. I guess you can say, "Oh why not just go into a normal or AI game." or, "Turn on the AI bot during practice tool." And indeed you can do this but you spend a lot of time wanting to switch the AI (by exiting and redoing the match) or going into a game. Any opinions on this?