I think people had a lot of assumptions about what this update was supposed to be.
The assumption, at least for me, was that the update would add variety to the top tier of weapons in KF, and that lvl 6 perks were going to get an incremental increase in power.
The reality is this: This update is the beginning of KF's prestige system, and the new weapons represent an entirely new tier of performance.
Look at this way. All the new weapons are SO expensive, you will almost never get them UNLESS you are a) playing the perk b) have the perk leveled up to at least two c) someone buys the weapons on the cheap and gives them to you or c) everyone throws you every dollar they make in game.
The update is designed to give higher ranked people advantages that lower ranked people, not playing the perk, won't get. Before, a sharpshooter could buy the DB, the best weapon for support, by the end of the game. It may not have been as powerful in his hands as in the hands of a support player...but it still had a huge spread and the support player wasn't quite as unique in his group. Now...you'll know who the support player is, because he's the one killing God with the AA12.
I think the perk upgrades are also setting the scene for how the future of KF is going to play out. To me it seems like it's being done in an MMO fashion. The perk bonuses are in the shape of a pyramid. At the bottom, you get alllll this stuff, and every level up you get progressively less until, at the top of the pyramid, you're getting a new weapon to spawn with and that's about it.
Plus there's the whole recoloring of the perk icons. I predict that future updates aren't going to add much to the perk stats...but will continue to add single, powerful advantages (like heavily discounting the most powerful, and the most ridiculously expensive weapons in game, or if we're lucky...single new abilities that rock.) This is kind of how MMOs work. They give you LOTS of crap early on to get you interested, and then the rate you get advantages at slows dramatically, and you start working towards single, powerful upgrades as a sign of your l33+ness.