I would cut feeding back a little.. Also not sure if it was mentioned but is your skimmer skimming sufficient? How is your water flow in the tank? Reason being if there is dead areas in the tank like near the sand bed or behind rocks it could cause issues. Do you clean the sand bed...
Since they were totally dry the only reason to keep them out of the tank that I can think of is to make sure they come out of the shock of shipment. If they seem to be moving good you could probabaly add them to the tank.
If they were drowsy and u added them to the tank their defense skills...