Please share more information about your problem? Your workspace doesn't contain any data. Can you share a template? (File / Save as Template)
Specifically I've set Lat / Long etc in the kmlViewSettings trasnformer and it continues to open to the default location. I tried using the values in this example and no good.
https://www.safe.com/transformers/kml-view-setter/
I think the <LookAt> tags in KML can be applied to almost any object. In you're example, you've applied the <LookAt> tag to every feature in your dataset (rnc_catalog_lines_densified). If you click on a feature then that view point will be applied. My guess is that if you applied the <LookAt> to a higher level object such as Document or Folder, then you'd get the <LookAt> as your default view. I've tried this for a Document feature type and it seems to work. I've attached the revised workspace:
noaa-rncs-shape-kml-2017.fmwt
<Document><LookAt><longitude>-90</longitude><latitude>35</latitude><altitude>0</altitude><range>800000</range><tilt>30</tilt><heading>0</heading>...