oviano
newest NUC (Haswell i5, HD5000)
i5-4250U - slower than desktop i3 which is rather slow for HQ 1080p
it would be a 'double fps if 30 or below' option.
this's an easy part 
i believe it should work like this with default setting
anyway you always can add another video profile for high frame rate source and set to "do not interpolate"
However, do you know if MPC will use the original source fps before SVP has adjusted it or will it use the newly smoothed-up fps as the basis for switching the screen refresh rate?
I'm not sure but since SVP kicks in AFTER playback is started MPC should switch framerate before this.
Otherwise you can just set x2 interpolation mode and let MPC set the output refresh rate