There is one thing that has always bugged me about the perk system of today, and that is that you are able to choose EVERY perkline available to you at the same time. You can choose perklines that focus on offense, and at the same time choose perk lines that focus on defense.
With the balancing changes, I propose that Funcom introduce perklines that lock out eachother, so that the player have to make a choice and a sacrifice. As an example: today an adventurer can choose both acrobat, bio shielding and spatial displacement. Three major defensive perklines, that together gives the adventurer godlike survivability.
What I would like to see is that if you perk bio shielding, you cannot perk acrobat or spatial displacement. The player would have to choose 1 of the 3. The description of L1 in acrobat would then read something like this: User profession = [profession list] User Level >= 30 Perk Bio shielding (L1) untrained Perk Spatial displacement (L1) untrained.
I only used the example profession (adventurer) and the 3 perklines above to illustrate my point. This is something that I feel should be introduced to all professions, so that the players have to make a choice to be really good at one thing, but then need to sacrifice another. If you want a massive absorb and a damage shield, you cannot have massive evades and immunity to roots/snares/stuns at the same time.