I am totally against using 4CC as a skate off for any reason. Good results at 4CC do not translate to good results at worlds. Case in point, Patrick won last year and bombed at worlds.
Conversely both Kaetlyn and Gabby had meltdowns at 4CC and are now world medalist. I think it's too close to worlds. It's good for front runners to get out their nerves before worlds, which is why some those that crash at 4CC will rebound at worlds. Conversely, it puts a lot of pressure on those that win to repeat their results.
It's odd that European is only three weeks prior, but seems like a better indicator of how they're going to do at worlds.