Dec 2015 surveys were abysmal. Photos show the team never left their car to inspect many of the paths, and all later paths from the Garland/Rowlett supercell were rated mostly EF1 with some EF2, despite stronger damage being apparent.
Earlier that year, they assigned a low-end EF3 rating to the Cisco, TX tornado, despite extreme damage to vegetation, vehicles, and houses, and clearly being well within the violent category.
More recently, the second of the two 2017 Canton, TX wedge tornadoes debarked trees, scoured grass, mangled vehicles, and leveled homes, yet was rated EF3. Aerial photography revealed that the leveled homes weren’t included in the survey for some reason.
The October 2019 Dallas outbreak surveys were also pretty bad.
So yeah, not a trusted WFO when it comes to surveys.