At this point, I do no feel like there will be too much changes anyway. Like I get that Brazil will be first, Argentina will be second and either Ecuador or Uruguay will be third and the other fourth. Uruguay is playing Peru and Ecuador is playing against Paraguay, which means that both teams will likely win the next games. Nobody guarantees anything but it is mostly likely that they will both win and they will keep their positions.
Brazil and Argentina both playing against much weaker opponents as well which means that there is a good chance we could end up seeing the top 4 winning their games and not having any sort of problem at all. Not really that shocking to see to be fair.
Your prediction makes total sense and that is what is most likely going to happen. I don't see high possible changes on this classification that could bring teams outside the top 4 to these positions. Uruguay and Ecuador look solid where they are, while Brazil and Argentina don't need comments...
On the other hand, Peru can still get lucky to manage a draw against Uruguay and then win their another game against Paraguay, expecting Uruguay is going to lose against Chile or draw at least. This way Peru can reach the fourth position. In a scenario like that, Peru would hit 25 points against 23 or 24 for Uruguay.
This is the best of all scenarios, but I start from a point, how can a country like Colombia, where they have every chance of qualifying, make such a mistake for a world ranking? They achieved a lot and lowered the level at the moment when they least had to do it? Now Peru is a country that can easily go to the playoffs, but Chile is also fighting for it, so the only way for Colombia to qualify is for a miracle to happen and for some scores to happen in a few games, which seems almost impossible to me.