i don't think successful spy ops necessarily need to kill enemy spies, my biggest problem is losing thousands of spies on a failed op and having your target lose nothing at all. even if they lost 1% of the amount you lose that would be better than it is now. your spies were detected and 3,000 were killed, but managed to kill 300 members of your enemy's spy network. perhaps spy tech could influence this as well. if you have tons of spy tech a failed enemy op you will lose 1%, if you have none you would lose 3% of their losses.

lincoln, i really like the redirect missle/BR idea. perhaps it could be more like "disrupt communication" and affect any harmful ops a country commits. this would give wallers a (fun) tool to use. it could redirect harmful attacks to a range of countries near the targets NW (so as not to be interrupted by GDI or NW limitations) and be cured like bioterrorism, a certain percentage each turn, perhaps military tech would influence the "curing" of it.