Based on quality there's already too few European sides and this expansion would mostly benefit everyone else.
Here's what it could look like with the currently suggested expansion:
Africa: Burkina Faso, DR Congo, Egypt, Ivory Coast, Morocco, Nigeria, Senegal, Tunisia, Uganda
Asia: Australia, China (playoffs), Iran, Japan, Saudi Arabia, South Korea, Syria, United Arab Emirates, Uzbekistan
CONCACAF: Costa Rica, Honduras, Mexico, Panama, Trinidad & Tobago, USA
Europe: Belgium, Croatia, Denmark, England, Iceland, Italy, France, Germany, Northern Ireland, Poland, Portugal, Russia, Serbia, Spain, Sweden, Switzerland
Oceania: New Zealand
South America: Argentina, Brazil, Chile, Colombia, Paraguay (playoffs), Peru, Uruguay