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New developer blog at: http://www.swtor.com/info/news/blog/20130405
In Game Update 2.0, we are introducing a new Bolster system that will behave differently than what we currently have. You will still get a Bolster buff while in PvP areas and Warzones, but it will no longer be based purely off of character level. Currently, Bolster is setup to bring characters up to a set level of stats that are appropriate for entry-level PvP. The amount of stats given to a character is based on their level, more stats for lower level, to bring them up to this “entry-level” PvP base. At level 50 we stop bolstering characters, which you can see adds to the huge drop off of effectiveness once a character goes from 49 to 50. With Bolster, the most important change is that the stats are no longer granted on an assumption of stat power based on character level. Rather we look at each one of the Item Ratings (including the Mods, Augments, Armorings, etc. that go into the armor/weapon) of the current equipped gear and base the amount of stats given based on these values. The worse your items are the more stats you are given to get you to the base value we want every PvPer to be at.
This new Bolster system is not as linear as the previous iteration and contains a greater ability to tweak from our perspective, which should mean a much smoother PvP Leveling experience for all characters. If there is a point at which the gain is too high or too low we can quickly adjust it on a per stat, per item rating level basis. Better control means a better balance. We have that control now.
A tangent of this Bolster change is the adjustments to the Expertise stat. In Game Update 2.0, the maximum Expertise possible to have on your character will be 2018. Wearing a full set of any of the new PvP sets, War Hero, or Elite War Hero gear will put players at that 2018 expertise cap. In addition, Expertise no longer suffers from diminishing returns. The first point is as effective as the 2018th. Once you get your full set of PvP gear you will have the max of your ‘PvP stat’. Later sets will have more primary, secondary and tertiary stats and increasing these stats will be how PvPers gain power in PvP, rather than going after a pure PvP stat.
The new PvP brackets will be broken up as follows: Level 10-29, 30-54, 55 & 55 Ranked.
Sith Warrior - Story of Hate and Love http://www.youtube.com/watch?v=sxKrlwXt7Ao
Imperial Agent - Rise of Cipher Nine http://www.youtube.com/watch?v=OBBj3eJWBvU&feature=youtu.be
Imperial Agent - Hunt for the Eagle Part 1http://www.youtube.com/watch?v=UQqjYYU128E