It's funny, I'm on 1000 with my own Mavic and thought it was quite good, but in the weekend rolled back a friends for him whose not really technically minded to .700 which was always a good firmware for me and WOW, I almost forgot how good it was, whist I was happy with the image on 1000, the image on .700 is SOOOOO much better, so I'm also going to roll back myself now.
It was quite easy, but I can't seem to roll back Dji Go4 to a previous version (iOS) so get a pop up box stating my flight will be limited to 50m and 30m etc... just tap and it's gone and there is no limitations at all on the Mavic.
Did you downgrade the RC FW too?