According to the Steam page for Kombat Pack 2, as of October 4th, the PC version of MKX will be almost on par with the consoles in the sense of characters and bug fixes. Netherrealm handed over the reigns to the PC port to Qloc. To people who owned MKX on PC, this is amazing news since it was clear that the game had been abandoned shortly after the first Kombat Pack was released.
As an added bonus, current owners of MKX will get the Kombat Pack 2 for free if purchased before October 4th. Steam currently has the game on sale, but Humble has the game about $10 cheaper. In fact, I bought it on Steam originally, but just did a refund to save myself the money by getting it on Humble.