Because even though they changed the Paramour trophy in the MELE they forgot about players who had a romance with Liara which fits the definition of rekilinding the romance in 2 at the end of Lair of Shadow Broker or realized that the Virmire Survivor was someone people romanced as well, I think they did this on purpose originally to force a personal conflict in Shepard romantic life on all three games.
Could there be a new side mission in ME2 LE where we meet the VS and it feels more than a cameo? Nope, just a remaster but ME1 LE gets the most treatment out of the three games which needed their each rework (they introduced two levelling systems and different MAKO controls depending on play style for one game but decided to ignore the other two games other than a few new paint jobs).
