My question is to seek an explanation about the scene with special forces. I couldn't think of any possible plot advancement or plot changes that the scene depicted.
Let's take a quick recap. Fox and Miranda were held captive and they both knew the bomb was timed. Blake took Jones to meet Fox secretly in order to brief him about the "updated info" on the bomb. When Fox was just about to brief Jones regarding the timed nature of the bomb, Blake said, "here comes the important part" (which clearly shows that Blake knows that the bomb is timed and it will go off regardless of anything). Jones hearing the brief said to Blake that we'll handle it from here leading to the fighting scene with Bane and died.
So Blake, knowing all, could tell Jones even before coming to the meeting that bomb was timed. Why didn't he? Even Blake said to Miranda that someone sold us out but she was seen later with Gordon confronting Foley so they even didn't doubt her due to this episode. So why put this scene with no purpose served to the plot?
I already had a discussion with Flater on his answer about what could've been done by the army to save the city (plot changes), using the information provided in the film (not in-universe, I think). I do seek the fit in the plot about this scene.
There are many scenes in a movie but they all contribute to the plot. An example is from Dark Knight where Joker burnt all the cash to second Alfred's point that "some people just wanna watch the world burn" and as he himself said, "...it is to send a message". So it gives insight about the Joker (that he can't be bought) and further contributed to the plot of the movie.
So, why Blake took Jones to meet Fox only to know the bomb is timed while Blake already knows it? There must be a reason for this scene or a significance, not just tangentiality.