The Guild Wars developers explain the goals with their balance updates that were pushed out in a patch June 12. They go on and tell us via their wiki that the main goal was to improve a few underpowered skills and to resolve certain PvP balance issues.
Some players have objected to changes in the last update to Ether Renewal and Shadow Form. We have not seen any actual negative impact from the Ether Renewal change, but we are still evaluating the high efficiency of Shadow Form farming builds. We will continue to monitor this issue and may make adjustments in the near future. Similarly, we know that the powerful Ursan Blessing is always the subject of much discussion. Some players feel it makes the game too easy while others think it is fun. We have not chosen to make any changes to Ursan Blessing at this time, but we will consider the matter as we move forward. Finally, we know there are continuing concerns about Wounding Strike from some PvP players, but we do not believe that changes to this skill are warranted at this time. We have, in this update, altered several other skills that are commonly used in conjunction with Wounding Strike in GvG. We will observe the consequences of these changes before revisiting the Wounding Strike issue.
They go into detail in their Wiki, curious? Check it out.