Getting back the old LFG system is not a option.
This is just because it was impossible for the GM's and most of the regular players to even start a normal conversation without people who can't (or refuse to) read/beggers or advertisers interrupting every single time.
It's possible that some of us see this as a minor problem, but for others (likely most) it is a big issue (ever tried joining a chat while being a known GM?).
Not even to mention what it will be like in a few months from now, looking at the servers growth rate...
Taking this problem + the fact that 95% of the people who can not behave in LFG are < lvl50 and the world channels being under development at the time we came up with a possible solution...opened a discussion about it and finally made a fix.
I am a bit disappointed by reading this topic, I was hoping for people to come up with improvements rather then just complain about other peoples ideas.

We really are doing our best to make the wowrage server as pleasant as possible for everyone (that includes me and my fellow gm's!).
I'm wondering why you didn't share your idea..?
A public (auto join) < lvl50 channel seems to me as a possible solution.
Maybe opening LFG for everyone who has just a single lvl50 char on the server is a possibility as well, so players with at least one lvl50+ char on the server can join LFG using their low level char.
If you come up with some good ideas I'm always willing to implement them in my (yes, most of us got a regular job) own spare time.
Just remember that issues like these are open for discussion and can be tuned/modified afterwards!