Quick Questions:
1) How did Han and Luke have their regular clothes AND shoes underneath the Stormtrooper armor, when they got out of the trash compactor?
2) When Vader sensed Obi-wan's presence while standing near the Millennium Flacon in the Death Star hangar bay, why would he not just run up the ramp and go on a saber hacking spree? I mean, regardless of what the Imperial officer told him.
3) Was Vader "surprised" when Obi-wan vanished in front of him as his cloak fell to the ground? Up until that point, Vader had never seen a Jedi just "vanish" at death, correct? Seems to me old Papa-Palps would have some 'splainin to do.
4) Why were the no troopers waiting at the trash compactor exit? Wouldn't they know the ONLY way out was through the door at the bottom?
5) In the S.E. when Luke runs into Biggs while getting ready to board his X-wing, how is this the FIRST time they are reuniting? I mean, weren't they just in the briefing room together with the other Rebel pilots?
6) Knowing that the Death Star could destroy the moon on which the Rebels were stationed, why was the Yavin IV Rebel base not evacuating during the Death Star battle?
7) How did the Rebels have time for an awards ceremony on Yavin IV? Unless the movements of the Death Star were kept secret from the rest of the Imperial fleet, I imagine a TON of Star Destroyers would have "hyperspaced" to the Yavin system at that point. And even if no one else in the Empire was aware of what was going on, you can bet the Emperor knew and would have sensed the Death Star destruction.
Here's my perspective:
1. I've never been able to reconcile it, but given that it doesn't pull me out of the story I can over look it. It's one of the rare instances where I can admit to that, because so much else is pretty rock solid on delivery. But yeah, if we're going to nitpick, I can concede on that one.
2. I presume sensing someone's presence doesn't work like a homing beacon, telling you their exact location. It's a feeling more than anything and Vader isn't exactly some rash villain who jumps the second he sees an enemy. That's what makes him so formidable. He's cold and calculated. Waiting for the right time to strike.
3. Vader was likely taken aback. Otherwise, why poke at the robes with his foot?
4. The smoke was too thick to see through and the troopers eventually guessed right that they escaped into the garbage chute and turned the compactor on, locking the escape door so they couldn't get out. Obviously the Empire wasn't aware that R2 shut down the compactor, until our heroes are spotted in the hallway a little while later.
5. I chalk that up to the gravity of the meeting. Even if Biggs was in the room ( I don't recall seeing him) it's not exactly the time for Luke and Biggs to have a gab at the water cooler. It's not like they were sitting next to each other either.
6. Just as the Empire's flaw was arrogance in believing that the Death Star was unstoppable, I imagine the Rebellion had good reason to hold their ground. They had nowhere else to go and it would be too chaotic to reroute survivors to a new rendevous during the battle. By ESB they'd worked out an alternate meeting place as evidenced by Wedge's comment to Luke after the Battle of Hoth.
7. This one is a bit more complicated. The real reason why this happened is that Star Wars was written as a stand alone film, with no guarantee that a sequel would be made, so the thought would have never crossed anyone's mind. The in universe explanation is likely that Yavin was at a great distance to the Imperial strongholds, so perhaps it took time for word to reach them of the Death Star's destruction? Plus you'd imagine even with Hyperspace it would take time for the Imperials to be able to confront the Alliance, at which point they would have relocated. The reason this has become an issue is because of recent canon changes that suggest Hyperspace is instantaneous, when in fact in all the films up until 2015, even at Light speed it took time to get somewhere.