Well, it finally happened. The dreaded nerf to Cheat Death was finally implemented in yesterday's Patch 2.4.3, and it seems like more than a few Rogues are unhappy. Oddly enough, the most important change to me wasn't the nerf itself but the adjustment to how Cheat Death works. If I'm not mistaken (I often am, though), Cheat Death is the only talent specifically designed to work with Resilience.
No other talent or ability in the game works or improves with Resilience the way Cheat Death does. Because the ability scales with Resilience -- the more you have, the more it works like the old Cheat Death -- it's a clear indication that the ability is for PvP. While there are talents that are more suitable for PvP than others, no other abilities are designed to work specifically with the Resilience stat. In this case, a Rogue would need roughly 442 Resilience points (at Level 70) in order to achieve the maximum 90% damage reduction. It's an ability that requires players to gear a certain way in order to maximize their gains.
Prior to Patch 2.4.3, many Rogues mixed PvP with PvE gear in order to increase their damage output (double Warglaives, anyone?) but were able to maintain high survivability thanks to Cheat Death. With the nerf to the talent, many PvE-geared Rogues suffered a significant reduction in survivability because low Resilience means an inefficient Cheat Death. It's an interesting shift because Blizzard has claimed in the past that it doesn't create trees specifically for PvP. In the future, it's possible that we'll see more PvP-specific talents that require Resilience or reduce Resilience directly. I think it's a positive direction in Blizzard's design philosophy.