Look, for example, at the "Attack on Red Bridge" scenario in Operation Hades. The Attacker's objective is "If you have at least one unit within the
defender’s deployment zone at the end of *any* round, you win the game".
These were silly enough once the Allies got move 2 infantry with Jump capablity, but now that the SSU has helicopters that can disgorge troops anywhere on the map, they're getting really ridiculous.
At the very least, make them so that you have to have a unit in the enemy's deployment zone at the end of round *8*, and not the end of *any* round!