I thought I would share my notes on two-channel recordings from the mixing board. 
To utilize them, you will need to do some creative editing and mastering.
I have noticed that depending upon the PA in which I mix on, the recordings are much different. In the past I have struggled with these recordings to understand what causes some of them to sound like absolute crap and nothing like the venue experience. 
Some Foundation of my two-channel recordings:*Left channel is used to record my Main Left output (Highpassed)*Right channel is used to record my Sub Feed to the PA (Low passed)
I chose these two feeds to be more versatile in my post-production processing and it helps for situations where I send a separate sub feed to the PA. Here is why: If I recorded the main left and right (full-range) all the time, when we had a PA which I needed to send sub, the high pass recording of left and right would lack all of the low end. Also, in post-production, I compress the channels differently. So, this is an additional benefit and works well once blended into mono. I do not stereo image my mixes other than the native effects.
The main struggle is that it has a lot to do with the house PA compression, as well as house EQ. Additionally, what I am recently noticing is that if the PA placement does not cover the audience very well, I find my recordings to be heavy on vocals because during the show I am trying to compensate for the people on the fringe of the PA to hear the vocals. (I walk the room with an iPad)
Stage volume is often an issue at smaller venues. When the guitars are turned up, their stage eq is projected into the audience and it blends with the house PA. If they have a particularly bright sound on stage, I end up compensating by NOT introducing those frequencies to the mains (only adding frequencies missing from their stage EQ, but after it has developed further out into the crowd). When this happens, my guitar tones in the recordings sound muted and plain dog-turd ugly. Also, stage volume can also affect the volume of the guitars in the recording
If the subs are not covering the audience well, I find that I turn up the "click" of the kick drum to at least give it some definition when the kick cannot be felt by the subs. Sometimes these are a little annoying in the recordings. Especially if the EQ of the click is less flattering due to PA house EQ.