That's a bit unfair. The battles with the adventurers outside and inside the crypt are very different, for a start. Both the undead fights are unique. Attack on Grove #1 is nothing like attack on Grove #2, the Hook Horrors present a fresh challenge, there's no sneaking-and-sniping at the Gith, you have to really work to get the high ground against the goblins at the camp gate and in the temple entrance, no high ground with the Spectator, the Paladins and the Gnolls are too close-quarters for ranged-attack cheese, it's not really viable against the Myconids, the Harpies, the Owlbear, the Ogres ...
There's also the option of, y'know, *not using* sneak-and-shoot cheese and exploring some other tactics.