Sub 2 w’kg rides can be tough with riders different abilities. Especially, as riders warm up they start to surge a bit faster. Rides normally begin a bit faster then recommended watts I believe due to anxiousness and excitement. As a ride leader they can only suggest the wattage and hope the riders play to the rules.
On, a ride I administer our warm up lap is at 2wkg and it often is between 2.3-2.5 on large excitable group nights. If that makes sense. Our next lap is 2.5 wkg and everyone is normally spot on at that wattage and there is little to no corralling of the riders.
Only thing I can suggest is stay vigilant and do not loose the draft. The easiest spots to sit in the group is close to the front and middle. Accelerate a bit more before the hill to avoid the surges of riders being too aggressive on the climbs.
Hope that helps!