I think that rating was based on the assumption that the Warrior would be tanking. Glyphs and crystals are important, sure, but if you're having that much difficulty all the time, the issue is probably more fundamental.
I don't think there's an issue here. You play leather and Warrior's HP isn't exactly the highest either. I have a 45 Slayer alt and I run into the same stuff. If I mistime a dodge on a big attack, I get owned. I think its just a design of the game.
I think a lot of people also don't realize that Mystic's Arun's Vitae (red ball) is also cleansing. Since Mystic's lock on cleanse is limited (correct me if I'm wrong) to two targets, if you are debuffed and near one, just pick it up to cleanse yourself so the Mystic can focus on another party member who may not be near a mote.
In a perfect game, sure. But this is a minor thing on the large scale of things and would require too much time. In short, there's not enough return on investment to implement something like this.
Also, just a quick correction, the story quest for CR is at 37, not 38.
The change has affected different servers in different ways. On Freeholds, I never noticed any problem with people spamming for groups. In fact, there was so much mindless chatter going on, people might post a couple messages to LFG but soon gave up after it was buried in chat.
The mindless chatter was lessened for exactly one day after the change was implemented. After that, it went back exactly as before.
For those servers where people were spamming "LFG SM" every 5 seconds, this was probably a very welcome change. But for those of us who are annoyed with the amount of mindless chatter that goes on in LFG, this "fix" has done nothing at all.