Perhaps look at the flap settings and final approach speeds on sharklet vs non. I would assume that your company is going with CAT C/D depending?
With the sharklet being slicker, it does seem a little more difficult to slow down, so depending on the approach procedures you use, it may take a little more effort.
As mayday noted,how that is accomplished is certainly variable with conditions, or subjective such as dropping landing gear earlier...
For some of the RNP AR procedures, we will probably use the CAT D criteria (as with the 738) for the design to help with the turns.
With the float issue, will look at the differences in the pressure wave to see if there is a significant difference.