New idea: Explosive lab.
Since the laboratory is dangerous in nature, I suppose it could have some role in the defense. Of course I won't suggest it to attack (Would make some sense, as they share the "top" coil of a tesla 7, but it is not a defensive building - they should be busy researching, not firing away), but to explode on destruction, dealing moderate damage around it.
This would have some impact on defensive layouts as the laboratory is considered to be just a time-waster and since it occupies a large space (same as TH) it could have some use on defense besides making attacking troops waste time.




