Absolutely right, CONMEBOL should have at least one extra slot in my view, 4.5 is just too few as basically all the teams there are good enough to qualify, and two of them are always qualifying: Brazil, and Argentina, which are both still undefeated. This basically reduces the slots for the rest of the teams and makes it extremely competitive.
Costa Rica vs New Zealand will be an interesting match, the all whites should be able to win there.
So, overall, my guess is that Oceania (Australia, New Zealand) will go to the world cup.
We had this discussion so many times. My suggestion is to have at least 6 slots for the CONMEBOL confederation instead of the current 4.5. Teams such as Qatar, Saudi Arabia, Tunisia and Cameroon will be participating in this edition of the world cup, while strong teams such as Colombia and Chile are unable to secure their qualifications. Now please tell me one thing. Are teams such as Colombia inferior to AFC teams such as Saudi Arabia? Even the lowest ranked CONMEBOL team (Bolivia) plays much better than Saudi Arabia.