As I see it the situation isn't any different. Only now, this rule will allow someone to compete equally in touring and GT12 with the chance to win both if they do well enough. There are still drop scores rounds as we have always had, so you can miss a few weeks and still have a decent chance in the championship.
Possibly one issue with attendance influencing the championship result is really due to the points scoring system. It is extremely difficult to make up a deficit due to lack of attendance because the winner takes home 30 points and second is so close in points - 29/30 = 97% of a win. I'm personally ok with how the current rules work, but if you wanted to improve this aspect the better method would be to increase the bonus for a win, F1 style... So the points from 1st to 5th might run 30, 22, 18, 15, 13 or something.
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