They still have some interesting options for Zen2, which in part didn't make it into Zen1 due to complexity and available time and other resources.
As I wrote before, they might use Zen1 as a more general purpose core to be used from top to bottom, servers to mobile. But Zen2 might be added to the portfolio as a more specialized core, improving on the remaining weaknesses of Zen1. For example a likely K12 related AMD patent (covering an AArch64 CPU) showed a third AGU. Schedulers, FPRF read ports for FMA, renamer, buffer sizes, SMT partitioning, etc. could still be improved on. Mind you, that Ryzen is where it is with all those trade offs.