[Jurollo]

I think you bring up a good point with the Official MTT and Sweat as 2 areas, I would moreover clarify this and look at something along the lines of..
a) MTT Strategy/Theory
b) MTT Sweat/Official Tournament Thread (Needs a catchier name)

I think that is the easiest distinction to make.
The problems I see with the others are as follows...
Like I mentioned, excluding new players and others not deemed elite from a given forum is a bad idea, there will always be snubs, which inevitably some of which will be valuable posters who will stop posting, and I dont think a forum of elite posters would continue to receive the traffic warranted for such a split.

Secondly, splitting the forum from low and high would leave some room for interpretation as to where rebuys go and also as mentioned before, some hands that come late in $20 can be applicable to early $500 play, tournament play is tournament play no matter which way you slice it and while opponent skill and stack deepness comes into play there are general concepts that stretch beyond buyins. It is, however, the grey area that makes this option less appealing for me.
~Justin