That issue seems orthogonal to creating superblocks. Superblocks just means that within a grid of NxN regular blocks, you limit car traffic and instead priorit

That issue seems orthogonal to creating superblocks. Superblocks just means that within a grid of NxN regular blocks, you limit car traffic and instead prioritize walking and biking. It's true that the blocks of Barcelona tend to be same-y looking, but that issue predates superblocks.