A couple of points. First this, as is echoed by YJ. I have had a number of career front 9s turn to shite on the back. Every time, it is because I lost my edge. It was not WGT, it was me succumbing to nerves and choking. I've had the same happen to me on late holes in a round. Congressional back 9, -8 after 8 and bogey the last. Yesterday, January Open at Kiawah, -12 after 16, finished the last two holes at +1. Conversely, some of the best back 9s I have ever played came following mediocre front 9s.
The second point goes to the question of ding. I am a feel player. Unless a shot I am attempting is dead straight, I only play for the ding on drives. Approaches, putts, chips, etc, I play spin or curve. I disagree with the 'If you don't ding, all bets are off' line of reasoning. I have never found any correlation between the consistency of my shots and whether I am dinging or curving. If I hit my mark on the meter, the ball goes where I want for the most part, whether that mark is the ding, or is a couple of centimeters before the ding due to a R-L wind, or a couple centimeters after the ding due to the green breaking L-R.
Lastly, someone mentioned this earlier. I do not think WGT focuses on individual players. If there is a program written to 'even things out' or something of that nature, I would think it would affect everyone rather equally. However, I am on the best string of golfing at WGT that I've had since I have been here. My last 10 rounds, 8 of them were sub-30 or sub-60. So, if I was asked, I would have to say the game seems more consistent and easier of late.