This is basically it. 2 panels are the most comfortable design. But at everything else it does not match a single panel. So its up to you what your thinking is when it comes to what is important. I have the Recon which is basically the same as ESS except for D-ring design. But the Recon stitching is the best.
Con:
-It suck to walk in
-it suck to put on
-it suck if you have ANY pouches on it
Pro:
-It is the most comfortable to sit in or lean in while hunting
-It is comfortable to climb in
So you have to ask yourself which matter to you most if you want to go with a 2 panels. I feel that the 95% that I will be using it for matter, so I removed all the cons simply by not wearing it in, accept that I will need an extra 1-2 mins to put it on at base of tree, and carry a pack instead of pouches.
One panel are simpler. If you care about wearing it in, having pouches, being comfortable 'enough'. Add a back band, then you can find a good single panel that would work for you. Majority of the communities are single panel I believe.