Even when you’re spending $225 million for an “extension” of a museum, there are trade-offs. Will the Cleveland Museum get its money’s worth? “For me, the answer at this point is a resounding yes. Rafael Vinoly’s design, which would cost $225 million to build, is undergirded by a precise, diamond- hard logic that mar ries dramatic physical changes with a new vi sion about the muse um’s potential. The key is whether Vinoly can follow through with details big and small that will make all the difference in the final product. This is no minor question.”