Lava Wall

I'm writing this post to suggest you a wall's modification. This mode is about only walls th10-11 because in my opinion walls are too expensive for their utility. My idea is that when walls crashed they create a little lava's area where enemies are burned. This probably could justify the cost and the utily of walls and the flying troupes have a better sense.
Sorry for my english. I hope to have been a help to you.
Have a good day
Helderest

Their price was just lowered, what more is required for them. Be grateful that they are very cheap for what they do.