Default shore-day move
Barcelona stay-close day
This is the right move when the traveler has a short port or pre/post-cruise window and should protect the city-core payoff instead of overreaching.
Barcelona can support big attraction ambition, but cruise timing often rewards one compact Gothic or waterfront lane more than a long city sprawl.
Best in a 3 to 5 hour central-city window with transfer time protected.
Stay in the city core unless there is a genuine full-day buffer for a broader Catalonia route.