I honestly think ABs would even be less of a netter terror if they destroyed no CS or at least fewer. I'd say ideally none tho. What makes AB so tough to recover from is it can take hundreds of turns to recover the CS whereas other attacks dont take near as long to recover from or destroy build.

I think the bomb structures op should be the same as well. If you take the CS aspect out of it, it's a more normal attack, and it's not like anyone is rolling into a city with a bunch of tanks to blow up a bunch of construction workers.

If they lowered the building returns and added pop returns or made it disrupt spies in some way I'd also be for it, although having the ability to kill spies I dont like because they are not purchasable, and would no longer provide protection in war. Each green AB maybe removes an available op for the day is something I could get behind.

Main point tho. No more CS for ABs and it's not a set ruiner as much anymore if one person hits you. If a couple people do it to you, you are sufficiently flattened and won't rebuild well. Pretty much balanced with other attacks that way.