I'm really concerned with the balancing pattern that seems to assume everyone has top-level gear. Things like Spirit Blade are really pretty useless with a low-level staff, so you effectively gimp new players without any real benefit. I mean, base staves do ~30 damage per hit. You used to do about ~100 damage per hit with Spirit Blade with a low level AW. Now, you'll do ~50. What? This is ridiculous. I have a good staff, but try to think of balancing the game for all players, as that's the point of balancing to begin with.
Another thing: I'd appreciate if someone did the math, but I feel like I could have better DPS (or at least the same) by just using the basic staff attack instead of Spirit Blade. The basic attack is 100% weapon damage, obviously, but it attacks faster than Spirit Blade and costs no mana. In fact, it builds mana. Not only that, but SB doesn't help against Guard and Barriers anymore, and doing half its original damage will mean half the original Barrier generation. If Luke wants it to be used for building Barrier between spells, this is a dumb way to do it, because even with a good staff before the patch you'd barely generate enough Barrier to maintain it, better yet build any. And you can forget any lower level players building any Barrier. This makes the ability pointless.
On top of all that, it kills the point of the Arcane Warrior, in the sense that he's supposed to be... you know, a Warrior! He barely felt like one at launch. He was a mage with a sword. Now he's just any other mage. This nerf, along with Isabela's, seem to discourage any kind of hybrid classes, which kills variety and therefore the game. It's depressing. For people like me who don't play much anymore because it's getting stale, nerfing fun kits doesn't make me want to play at all.