Everyone wants these sphere wars to be quicker and not last for months, but no one wants them to be more decisive. You can’t have both. You either have quick wars with high losses, or you have very long expensive wars.
If you remove the number of spies killed, their use in battle is nullified. Units are too hard to spy away if your opponent has more than half of their spy count. If you increase the number of spies you can get per day, the meta will be to murder spies until the end of time. That doesn’t solve anything, if just takes away from spying’s other uses in wars. Your spies are still going to die, it’s still going to be fruitless to buy them back, but now you get to do it for a longer time!
The issue is with how the spy vs. spy mechanic is set up. But this isn’t the thread to introduce an entirely different mechanic idea.