I think the current system is fine, no need to make it even more complicated. You're saying spry has more powerful kingdom, obviously that's not true when the other guy has so much more space. Spry had a choice to do the same but didn't do, but guess what? I'm 100% sure he will do that in the new versions
Also does there always need to be a short-term option to fix stuff? Imo, no. Why would anyone zero other players cap if it could be rebuilded in 5 hours? Why would they kill their hammer? If spry really is stronger than the other king, he will gain the area eventually.