It doesn't matter how they spin it, Pascal was a rushed compromise and didn't exist ~2 years ago. They cancelled a uarch i forget the name of nearly 3 years ago, and moved Volta forwards from its already slightly delayed ETA to fill the gap. Then they announced that Volta had been pushed back at least another 18 months, and that 'Pascal' would fill the gap.
Since then there has been much speculation about it being a half way house between Maxwell (non-asynchrous and non-parallel) to Volta (much more GCN-like).
The reality is that Pascal is quite clearly FINFET Maxwell.
Huge clocks (which add to TDP and probably significantly reduce useful life) can't make up for an architecture that's already looking long in the tooth, and is now expected to last well into 2018. Software tricks like Multi-Projection aren't going to cut it.
It's now abundantly clear why that Stardock developer implied that Pascal wouldn't be efficient enough for certain applications, and Polaris would ... high clocks are NVIDIA's only weapon.