Are you referring to the "main pivot".. the one around the front derailleur/BB area? Suspension kinematics can be very sensitive or very insensitive to pivot location depending on the overall layout and many other factors. For the Instinct and some of our other bikes for which the suspension design is several years old, the main pivot (MP) location is mainly driven by sizing and physical constraints. Because of the diameter of the main pivot bearing, and diameter of the bottom bracket (BB) bearings & cups, there's a minimum height that the main pivot must be from the BB. The rearward location of the MP is driven by front derailleur mounting points, as well as suspension kinematics. The MP could move further forward and affect the suspension rate curve, but that also increases the distance between suspension pivots, opening up the size of the "rear triangle" and makes the rear end flexier.
There's a whooole lot more to suspension design than this, especially from what Rocky has learned from prototyping in the last ~2years, but the above generally describes the reasoning for the MP location on that specific Instinct suspension design. Modern suspension design for pedalling efficiency depends on almost all aspects including all pivot locations, tire diameter, BB height relative to rear axle, front and rear gear sizes/diameters (for average or instantaneous chain line), virtual swing arm, etc.. all this sums up to anti-squat percentage, which is a very good indicator of how efficiently a design will pedal under a steady-cadence seated rider.
