If they are in the hive proper and the bees don't seem to mind them, I would worry about the density of the bees. I always find it a bad sign that they will tolerate roaches in the hive...
My observation hive experiences back this up. If the hive only has a small amount of bees the roaches will live in it. I have had as many as 5 roaches living in the OB with the bees. They just stay away from the bees. As the hive starts to fill, they end up being trapped in the top of the hive. As the hive starts to have enough bees to fill the hive the number of roaches decreases. I see a change in the behavior of the roaches as the bee population increases. They go from just moving to a bee less area to panicking, trying to find a bee less area. Then they disappear from the hive.
They do not show up again until the bee population drops to the point that the bees cannot protect the entrance.