Same problem here. Just came back from a 2 day field work trip, all images blurry.
Also, I just tried the "workaround". It works, but dronedeploy is still unusable in real life with a mavic pro:
1) the "workaround" takes time to set up, precious battery capacity is lost.
2) All settings are lost during a battery change during longer missions. Battery losses are duplicated each battery change, rendering dronedeploy useless for bigger areas.
3) The tiny camera preview image in the app is useless to check if the camera is in focus, so at least give us a way to make it bigger and zoom in for the next update (unless there is a way already and i haven´t found yet)
4) It has been more than half a year since the mavic is on the market, how are unfocused images (and no raw support) still a thing????
If anyone knows a good android alternative to dronedeploy (or a better "workaround") which is actually working with a mavic, please tell us (pix4d capture seems to have similar issues).