The devs tend to focus on such map clipping issues when they can be used in PVP content. Given that this clip appears to be in a patrol area of PVE content, and to my knowledge has not been a glaring enough issue where players routinely fall through the world geometry in that spot in the year and a half since that content was added to the game, it seems unlikely the devs will address this clip with any speed, if at all. (΄◉◞౪◟◉｀)