Disappointing to see all the squabbling about “on the go” when this (non-standard) phrase likely had no impact on the incident. I think it very likely that all involved clearly heard “Fedex, on the go” and understood its meaning, improving situational awareness for both the local controller and SWA. The two phrases that likely degraded situational awareness at a critical time were Fedex’s highly inappropriate “Southwest abort” and SWA’s “negative” with no identifier.
Curious to know what was the trigger for Fedex to go around. Visual on SWA? Intuition?