One word: NO ebs are made to make gold not lose gold or get off to regen get on in a hour and have zero men
I don't say anything about losing gold...and I didn't mean to say drain all of your troops. Oh wait...I didn't say that. It is an "idea". Just a twist...
oh yeah! Imagine: those towers you feel are a waste in an EB making you gold because defense strength matters. Heck...you could even just add a "defend" button on troops which in some EBs hits harder (think cavalry running into a well-formed phalanx) or in PvE uses troops to reduce the success rate of the next incoming attack. But, yes. I love the idea of an EB attacking players actively, and each unsuccessful attack would count as a hit in the EB as if you'd attacked it!