I’ve got a 2016 GS which will have essentially the same ESA setup
Mine has the dynamic pro etc. but I believe the basic ESA has at least the 3 preload settings, solo, with passenger, with passenger & luggage
There are also 3 damping settings, soft, normal and hard which you can select as you wish or just accept the default settings linked to the 3 modes:
Rain, which gives dulled down throttle response and soft damping
Road, which gives normal throttle response and normal damping
Dynamic, which gives sharper throttle response and hard damping
Some folks complain that the dynamic ESA on later bikes doesn’t give you control of the preload as it is automatic
I personally think the 3 selectable preload levels are great, I ride 2 up a lot and often with full luggage so the push button adjustment for me is a god send
I hardly ever change modes though and wouldn’t miss them if I didn’t have them
Hope that helps