To be fair, the X2 / P1 or whatever they're calling it now offers 750 GFLOPs at 1.5 GHz which is the absolute maximum and nVidia strongly advises against clocking it that high. The performance gains in terms of GFLOPs would be there, but nowhere near as big to make a noticeable difference or justify the extra costs into putting Pascal into the Switch. At least not on clock speeds that would prevent any potential thermal throttling.
The battery life would have been better by around half an hour (?) but again, it's not worth the price difference and outside of Zelda, the battery is actually quite good in standby and less demanding titles like Fast RMX and Super Bomberman R.
The only real noticeable gain would have been the memory bandwith, which would be doubled from Maxwell and the Wii U. This will probably prove an issue for developers of larger games, and might explain the framerate dips in BotW, though again not worth the potential delay and price bump due to rushing in Pascal.
All in all after the Eurogamer leak with documents from December I started loosing hope for Pascal so I wasn't really surprised, however nVidia calling it custom is a tad misleading, at least from a hardware perspective. It's the best Nintendo could have used and since nVidia's not doing great with devices that use the X1, Ninty must have scored a pretty darn good deal on the SoC.







