A design element that deserves to die: The time limit

Ahh, our old enemy the time limit. Is there a lazier way for a designer to increase the difficulty of a game?

The latest object of my scorn due to this lazy design element is Star Fox Command on the Nintendo DS. Before you get to the Star Fox part of the Star Fox game, you plot out flight paths for Fox and his allies on an overhead map of the planet, keeping in mind enemy squadrons that approach the Great Fox, cities that need liberating, and objects on the map that may assist you in your quest. The caveat? You have a limited number of turns in which to accomplish the planet’s mission objective. You can increase the number of turns you have remaining by liberating cities under enemy control. →  Densha de Read! Shinkansen