On a whole, this season finale of Warehouse was stronger than last season's. There weren't any stupid surprises out of the blue characters going crazy--and it reversed the senselessness of Steve departing so early. The two episodes also feature tons of action and visual effects along with the emotional death of Steve and Mrs. Frederick. The episodes were definitely exciting, enough to ignore the expect lapses of logic.
The Warehouse getting blown up at the end of the episode was spectacular and would have been a game changer. But Artie busts out MacPherson's pocket watch and implies that it can reverse what happened. Great. So after an awesome explosion to end the season, this watch can turn back time and everything will be fine?