Considering he's moving to Seattle this fall it wouldn't make a lot of sense to be in Berlin when he's moving across the country again.
When your job is professional runner you should be in Berlin running against the world’s best.
Considering he will have several months soon of not having races to travel to.
As the old saying goes "Strike when the iron is hot". Unless he's injured or not 100% and doesn't feel he has a sub 3:30 in him there's no reason to travel overseas to run slower than his PB. Take the cash at 5th Avenue and shut it down.