I have a swarm hive that was caught about 4 weeks ago and used brood frame with them. This hive was doing just as you described little to no activity. I ordered a queen with 2 day delivery and the same day found what I think is the queen that had hatched out and removed her. The queen arrived yesterday and 2 hours after putting her cage in the hive the hive explode with activity. Now I was advised in chat last night that I may not have given the new queen time to get her act together, and by the time line I was given it is very possible I didn't. I am very new to this so this is my observations no more no less. Good luck