This answer makes me think that Hamlet’s thinking of rustiness in the same way we might – that is that the players have slowed down and haven’t been performing as much. Rosencrantz indicating that they’re still at it, at the same old speed would suggest that the question had to do with a decline in production.
But no, these players are churning out shows the way they have always done. I would like to see the players home season before the little eyases turned up and chucked them out of business in the city.