First question is - why? What's the benefit? If you want to roll to the end fine, but to disarm/cancel rev just after touchdown exposes you to other issues/distractions. Leave everything where it should be and only cancel reverse when sensible to do so. The spoilers can stay till vacated.
What about if the runway is wet? Same practice?
killing the spoilers increases your chance of aquaplane....and then the
only thing that will slow you is Reverse (which you just cancelled)
Just stick to safe SOP's - it's when people try to be clever that things go wrong (like landing long to vacate at the end..........)