From looking at the data in the latest report, sure looks to me like the pilot pulling nose up (and the THS at full nose up) were not enough to keep the aircraft in the nose-high attitude and thus, the full stall.
Notice the ENGINE THRUST traces vs. attitude during the stall. Every time the pilots pulled back on the throttle, the nose fell through as it should. The engines (thrust) was what kept them in the nose up attitude and in the stall, not the pilot sidestick commands OR the THS.