Players have long asked for our viewpoint on these ways of playing through content. For the most part, we think these are acceptable ways of playing Guild Wars but may occasionally take steps to increase their difficulty or even block a particular build. For instance, when it comes to Shadow Form, there is little concern about solo farming in most places; however, the speed clears of our most difficult content have become fast enough to warrant a more watchful eye. Over the coming months we will monitor these areas and, starting with Cry of Pain, make adjustments where necessary.
Copied from- http://www.guildwars.com/gameplay/de...l_balances.php
Cry of pain is nerfed whats next :P