You are right, and the results of the current 6 matches will make the remaining matches very interesting and difficult to predict. The favorite team can get results beyond predictions. We may be able to choose our favorite team, but this group has a tight competition.
All teams still have a chance for 2nd position. It depends on their readiness next year to determine whether they will qualify for the World Cup directly or continue to the next round to continue the competition for tickets.
But these surprises don't only supply to the Asian Football Confederatio, it is the same for CONMEBOL. 18 points for Brazil after 12 games is ridiculous, but since the continent is rather weak these days, Brazil benefits from it. Some years ago Uruguay was so strong and teams like Colombia were hard to beat, but now that they are not as good, Brazil will probably get away with it, play an embarrassing qualification and yet make it to the World Cup in the USA + Mexico.
It is not a lack of talent, but a lack of dedication and this was proven when Morocco went so far at the last World Cup. They beat Belgium and tied the game against Croatia, then beat Portugal and Spain in the knock out rounds. But could Morocco do that because they had the better players or because they have shown unprecedented dedication?
I think we will get to see more often where underdog nations because of their will power will beat the favorites in these tournaments. Teams like France and Spain take it easy because they think they can play a training session and yet win, but no. Frankly, it is a lot of fun to watch the underdogs giving the favorites a hard time.