Sorry for the very late reply.
Thanks to your report, DDJ-1000 engineers finally created a beta firmware to improve the linearity of the cross fader.
Will you please download and install the both DDJ-1000 firmware and rekordbox beta from the link below. You need to update the both at the same time. Otherwise, the update may not be effective.
Please provide your honest feedback to us.
Sorry for the lingering inconvenience and thank you for your kind cooperation.
CRM, Pioneer DJ