Definitely don't hamstring players to do things the way you want them to. It reminds me of FFXI. In it, the samurai job was made and intended to be the third tank class in the game. However, the players formed the samurai into one of the massive damage dealing jobs. The Devs of the game were astonished at how the job was being utilized by players, so decided to create gear and abilities that supported that play style for samurai. THAT is the right way to treat your players, not to penalize them for a solid strategy to help them achieve goals. Fix the bug of aetheon and the oracle falling off cliffs, but not strategies that are sound.