Not sure whether there would have been TCAS alerts because it may have been
inhibited on landings/take-offs -- and because ascent/descent vectors may be
sufficiently extreme during that phase so software extrapolations may have been
inaccurate.
Could be. Followup media coverage does say that none of the aircraft had a TCAS alert. Followup stories also specify the separation between the three, and FAA's denial that a collision was imminent.
I mainly mentioned TCAS because there's an obvious discontinuity in the audio presented. (While the media uses soundbites of said audio to paint the picture of three aircraft careening towards one point in space, when it's actually audio of the conversations that took place after the conflict had been resolved.)
