You can add the following define to change the hold time for power off:
#define BUTTON_HELD_LONG_TIMEOUT 1500
If you want to make it shorter than 1000 you might need to change the medium time as well:
#define BUTTON_HELD_MEDIUM_TIMEOUT 1000
As for the extension and retraction times, you can find them at the end of your style:
InOutTrL<TrWipe<300>,TrWipeIn<500>>
You can change these to something smaller to make it ignite/retract faster.
You may also want to consider writing your style like this to make it easier to read:
StylePtr<Layers<
AudioFlicker<RotateColorsX<Variation,Green>,RotateColorsX<Variation,Rgb<0,200,0>>>,
AlphaL<NavajoWhite,SwingSpeed<600>>,
LockupTrL<Layers<
AlphaL<AudioFlickerL<White>,Bump<Scale<BladeAngle<>,Scale<BladeAngle<0,16000>,Int<4000>,Int<26000>>,Int<6000>>,Scale<SwingSpeed<100>,Int<14000>,Int<18000>>>>,
AlphaL<White,Bump<Scale<BladeAngle<>,Scale<BladeAngle<0,16000>,Int<4000>,Int<26000>>,Int<6000>>,Int<10000>>>>,TrConcat<TrInstant,White,TrFade<400>>,TrConcat<TrInstant,White,TrFade<400>>,SaberBase::LOCKUP_NORMAL>,
ResponsiveLightningBlockL<Strobe<White,AudioFlicker<White,Blue>,50,1>,TrConcat<TrInstant,AlphaL<White,Bump<Int<12000>,Int<18000>>>,TrFade<200>>,TrConcat<TrInstant,HumpFlickerL<AlphaL<White,Int<16000>>,30>,TrSmoothFade<600>>>,
ResponsiveStabL<Red>,
ResponsiveBlastL<White,Int<400>,Scale<SwingSpeed<200>,Int<100>,Int<400>>>,
SimpleClashL<White>,
LockupTrL<AlphaL<BrownNoiseFlickerL<White,Int<300>>,SmoothStep<Int<30000>,Int<5000>>>,TrWipeIn<400>,TrFade<300>,SaberBase::LOCKUP_DRAG>,
LockupTrL<AlphaL<Mix<TwistAngle<>,Red,Orange>,SmoothStep<Int<28000>,Int<5000>>>,TrWipeIn<600>,TrFade<300>,SaberBase::LOCKUP_MELT>,
InOutTrL<TrWipe<300>,TrWipeIn<500>>>>()