Here are a few more points to consider:

(1) maybe Ady could add a "bit" of the balcony on the left-side of the building Leia and Co. leave from. Sure you could assume the balcony was on the other side of the building or just out of sight, but that would definitely "cement" the balcony's place by referring to it as an actual part of the building's architecture other than just a thrown in shot.

(2) I like 005's idea of adding in some orangish lighting in the back left areas of the hallway to further insinuate the balcony's existence.

(3) Ady: would you consider showing ships leaving Cloud City or some similar activity outside the balcony shot, as well as some moving clouds? Maybe even some of those red lights that most buildings have on top to keep airplanes from crashing into them or alarm lights and/or sirens in the distance to indicate the entire city is on alert and being evacuated.

This could also be applied during all of the outside escape shots:
(4) when Leia and Co. are first outside the building and the stormtroopers are shooting at them, in the distance you can see large groups of small to large ships leaving - not so much actually taking off of landing bays, but moving from behind buildings and moving up into the air. Again, could add faint background sirens.

(5) when we see the Falcon take off, you could show hundreds of specs of light of all the escaping ships (ala something along the lines of the Battlestar Galactica fleet - maybe not so much AS enormous in scale, but something to show an entire city is evacuating and the Falcon is escaping either in the middle of said evacuation or at the tail end of it - hence we can see the vast majority of escapees already far in the distance.

visual references:
Space 1999: Wargames (when moonbase alpha is evacuated)
Deep Impact (I believe there is a scene where multiple helicopters are leaving a city)

(6) when Leia picks up Luke, possibly continue to show in the extreme distance the lights of the hundreds of Cloud City escapees, but maybe have the Falcon do the "immelman" manuveur because there is an escaping ship or two the Falcon has to "loop around" in order to head back to Cloud City.

(7) defintely consider upping the TIE fighter number to 8 or larger, since Vader would definitely not be pulling punches at this moment and would think that he would have them cornered. The 4 TIES before and during the asteroid sequence could be explained as Vader "herding" them to a hiding place (ie. he was doing an alternate version of the same plan he concocted with Tarkin in ANH - make them think they escaped while making it look good), whereupon he would intercept them, capture them and then set a trap for Luke.

Now that it is definite that they are all together, there would be entire squadrons of TIES from the Executor itself going full force to herd them directly to Vader. Now since the TIEs would be there to "herd" them and not destroy them, it would explain a large number (be it 8 to 20) chasing the Falcon and still NOT destroying them.

It could also help explain why the Falcon wasn't tractored in during that first "Executor hull shot" - so many fighters flying around the Falcon it caused trouble for the lock-on. An officer would give an order to the TIE pilots to back off, then allowing for a lock-on, whereupon the Falcon makes the hyperspace jump.

While not necessary, it would be interesting to hear the officers frustration in the background of the Executor bridge shots (as if they are coming from the pit crew a good 10 to 15 feet away from Vader, who is in the foreground in all of the bridge shots), something along these lines:

"sorry sir, we're having a hard time locking on. There's too may fighers around the target"
"(talking to TIE captain) TIE leader, you're too close. Back off and we can make a lock with the tractor beam"
In fact this dialogue could happen directly before Piett goes to Vader and tells him "they will be in tractor beam range shortly". You could even overlap the dialogue a little (time the last part of the second sentence to blend with Piett turning to face Vader) - being that it would be quieter and behind Piett, as in the above situation is what provokes Piett to say something to Vader, who has to be wondering why they haven't tractored them already.

Maybe even have multiple background chatter (that is a little fainter so we can't hear specific words, but still indicate a busy bridge) which then goes silent once the Falcon makes the jump. IE. everyone on the bridge is intent on capturing the Falcon as Vader (be it out of fear of Vader or just pissed at the ineptness of the other SD captains - I would think these people would be a bit more elite serving on the Executor and would have something to prove) hence the bridge chatter to indicate the busy-ness of the crew to make "this" work - which then goes silent to further emphasis the "holy crap, we failed. What is Vader going to do now?" ambiance.

In fact, if you like this idea, maybe this is how you could have a contest so to speak so 2 lucky people could get audio cameos. Even if you limited it to those in England (being that the Imperials do all seem to have a British accent) you could pick either some friends or winners to do said (or similar) dialogue as well as bridge background chatter.