Alright so I have brought myself up to speed, so I'll lay down a comment here.
Basically I will start by saying, who is really in a position to decide who's saga/firstdrop/jiberish/etc question is any more valid than the last guy. Gear Talk is a place for people to come ask questions and get answers, we are not trying to turn the forum into a wiki with only the best of the best written threads allowed. We do try and keep it clean with the worst threads being removed, but we aren't going to start filtering each and every question people want to ask, because in some way its important to them. We will continue to encourage people to use the search, and to bump existing threads, but we wont force them
Second the idea of forum specific mods is a good one, but not a feature we currently have, and our development calender is full for the next few months. Not saying it will be added, but it is something to consider.
Splitting is something we can consider, but again I won't promise that just yet. The forums and how they are divided isn't something we can just shake up.
In the mean time, try and be helpful and make good use of it the way it is. If someone asks a question on sizing and you know the answer, why not post it. Takes just as much time to post "Fits smaller than the size" as it does to post "Searchbar you newb!!", and that way you also end up with 2 threads with the real answer that someone can find when searching. Remember, posting useless responses does nothing but bring poor threads to the top again, if its not worthwhile, just let it die.