Well, I only have the pre-2012, and have never tried the new one, but from what I can tell from the website, the only changes are the color of the netting, the spreader bars are now included, and some tieouts have been added for going to ground if needed. It appears that the size and weight are the same.
As for those improvements - DIY spreaders can be easily made, small eyelets or web loops can be added to the sides easily.
It seems to me that the only improvement that could not be easily done would be changing the netting. The black would probably be nicer but I don't really mind the green.
Another 'improvement' that I made to mine was to add a few extra strips of velcro along the open side to keep things in place better.
If I were in the market, I would get the new one. But it doesn't look like enough of a change for me to want to 'trade up'.
But, I see they now offer their tarps in something other than green or camo. Now that I might 'trade up' for