I'm so confused.
Two things not mentioned in the article are (1) it will elevate the FIFA rankings of the better UEFA clubs, which will put more of them in the Seeded pool for World Cup draws. The way the FIFA ratings work, competitive fixtures are weighted more heavily than friendlies. If UEFA is in fact replacing many friendlies with these 'competitive' matches, there are more games with higher weighting to them. (2) It will limit the number of friendlies teams from CONCACAF, CONMEBOL and the other continents will paly against UEFA clubs. They will have fewer openings for friendlies.