The problem with progressive short travel suspension is that it is almost impossible to realize its full travel without making shock air pressure so low that it begins to bob a lot while pedaling. And anti-squat forces(that prevents shocks to be compressed from pedaling) are also not so high here. Canyon Lux, Orbea OIZ and BMC forstroke all have anti-squat more that 100% at sag point even with 36t chainring upfront.
In the end: if you want good pedaling platform with this frame, you'll have to use high air pressure(low sag %) and low rebound, in your shock. And with that amount of pressure its almost impossible to use it at full travel (if you are not jumping trails). Actually I was not able to fully compress the shock while riding. Ever. I think, this is why Specialized using brain with this linkage design. All 100mm epics come with brain.
