Oh, and, yeah, you're right, the problem with getting lost in the jumble isn't insurmountable, so the classing isn't absolutely indispensable, but it simplifies things significantly. (Which appeals to me as a Chaotic...the less work I have to do to get something done, the more likely I am to follow through. >_>)
Were it up to me, I'd say go in and overhaul the tag system completely, but I'm in charge of neither LJ nor IJ, so...