unleash the heroes!

When the upgrade came out to hold heroes to only a certain area it seemed to be a decent idea. One could no longer pull them to the side and beat them up. But now, it saddens me to watch my base get attacked and have the heroes just stand there doing nothing while enemy troops are mere inches away. My suggestion would be to make it so they are like the hidden tesla. Once a base is 40% destroyed or the attacker has dropped say 60% of his troops, allow the heroes to run wild throughout your entire base. Thanks for listening. Love Love Love the game!!!!!