I'm not suggesting that you just do it using the console. A checkbox in the wrench GUI would be better, to toggle whether the emitter appears the way we're used to it or the new way. I personally don't care whether people choose to use the new emitters style or not, I just wanted people to know it's possible to have it the old way.
As for the mission editor, umm no.
A much better way:
%brick = %client.wrenchBrick;
%brick.emitter.setScale("0.01 0.01 0.01");