RWA:
[Chart] shows that, at the time the THS started moving and the sudden climb commenced, the PF was applying relatively small movements, up or down - largely consistent, in my less-than-expert view, with an attempt to 'fly pitch and power.' However, the THS was already well on its way to 'full up.'
Where are you getting this fantasy from?
More importantly why?
According to the report and the controls 'chart' the THS does not move appreciably until some 45 seconds into the event, at which point the aircraft was at the apogee of the climb. The first 10 seconds of the event consist entirely of varying degrees of NU command. There's you climb... nothing to do with the THS.