Hey guys! Love this mod idea! The thread is way too TL;DR though.
I thought I'd offer up some ideas for the ending.
After Admiral Hackett gives the retreat order, use the sound clip from Joker from the beginning of ME2.
"No, I can still save her!" (You'd have to edit in an optional him, or find a matching urgency Shepard!)
Have Hackett pause then find a short clip of him giving something like, "We'll give em hell." Another generic edited clip that could be changed or interpreted as a battle order would be good here. Even using something from the Battle Groups reporting might work. Crowd sourcing might help on getting a good mix here.
I wouldn't if during the fight you cut down on Joker's talk to the "Come on girl, let's give em Hell" line and added an EDI prim response of "Yes, Jeff." or something of the sort.
Then have Hackett use one of his generic "What's your status" lines and just have Jeff or EDI Or Cortez use a generic "Launching shuttle" line.
(I specifically don't like the "You better use a Shuttle for this one" line, it has Joker using his laid back joking voice, I'd prefer at least a strict by the book Joker here.)
Anyway, some ideas, if I can find the lines, I'll copy and paste links to appropriate sources.