I agree, why would you want to have to finish a bad round. If I start an unlimited tourney or the qualifying, why should I have to finish if I start off with 5 straight pars, knowing that it will take 13 under just to qualify.
I believe the unlimited number of qualifying round helps the average players more than it hurts them. Some players make the cut line and quit playing, a few want to try to get the lowest possible score and continue to play but having unlimited replays allows the average player to have that one great round that gets them into the tourney. I would suggest that if it was one and done the players making the cut would be even more of the top players than it is today.
WGT is never giving up the unlimited play, lots of time watching commercials, burning up balls, etc. why should they.