I could be wrong but, my impression on the reaction of Liz on Matt's "soft side" was already nullified. When MC visited Liz during her last presentation, ChatLogsRomeo shows Liz giving cold responses to Matt. She even said "she is not impressed". Then in the 0.21 update, the blackmailing just continued which is why the 2 Matt events happened (fingering and cunni). There is no more indication that Liz is still considering or being affected on Matt's soft approach.
Well, just my 2cents. Each of you have your own, and what I said above is just mine
Who knows, maybe in 0.22 something will happen that will spark the confusion on Liz again, especially now we know that there will be a week long out of town work. In that week alone there will be a lot of chances for Matt being alone with Liz and proceed to his advances to her, without a boyfriend or bestfriend to visit her and inerrupt Matt.