Bye the way the other 3 pots will be based on ranking position and not on location like in 2014.
Looking at the potential seeding this seems to be a much more balanced system actually and reduced the chances of a group of death.
https://en.wikipedia.org/wiki/2018_FIFA_World_Cup_seeding
a group like
Germany
Spain/Italy
Colombia/Uruguay
Mexico
is not possible with the new system
I can see your point, but I think that a system were Spain and Italy if they qualify, are not seeded, seems fundamentally flawed to me. FIFA gives too much value for its fairly useless ranking system. Historic performance in big tournaments has to be given much bigger value in their calculations. Poland has no business being seeded.
You could still get a group of death with the new system. You can have a Germany, Spain, Croatia and Ivory Coast or a Brazil, Italy, Denmark, Serbia.