That's right, I'm talking Declaration of War not natural enemy.
The DoW proposal still exists but as it cost money compared with a natural enemy proposal it is very rarely used. I therefore propose the the DoW approval time is reduced to 12 hours.
Idea is that if nation 'A' launches a NE on nation 'B' then nation 'B' has the option (if they are willing to meet the gold cost or perhaps change it to 1,000,000cc) to counter propose a DoW.
If the DoW passes before the NE then nation 'B' has initiative.
Ofc, nation 'A' could start of with a DoW to make sure they get the first blow in but would then miss out on the NE fighting bonus.
+Restores tiny bit of strategic thinking/consideration
+Possible gold or CC sink
+Doesn't effect eRep labs profit from pack sales.