No, it didn't. Where are the Kaby Lake i9's? Where are the Kaby Lake's with > 4 cores? They're MIA, I think because Intel is just using the same die for Kaby Lake-X as they used for desktop Kaby Lake.That trend also changes with the addition of the four-core Kaby Lake-X i5 and i9 series to the HEDT stable.
No, the exclusive cache is probably referring to L1 + L2. Perhaps it's even divided into yet more levels (hence, Multi-Level Cache).Intel also quadrupled per-core L1 capacity from 256KB to 1MB, which benefits multi-threaded performance.