Okay, not getting into the obsolete-think crap, and confining myself to the
much healthier obsessing over nerdy minutiae...
I don't know what Felicity is wearing in that last shot. Gunners don't have hard armor. Pilots don't have belt boxes, and the chest armor is modified for the life-support box to be mounted to it (whether it's attached or not). Might be something new. Might be a new take on a Stormtrooper pilot flight uniform, a la the "updated" Stormtrooper armor and helmets...
Timeline stuff...?
For the most part I'm pretty excited- but now we have the same walkers 30 years- or whatever- before Empire? And Mon Mothma is still in the same dress in front of the same green battle map thing? Everything doesn't have to be the same, does it? But like I said, still pretty excited.
Bad Star Wars is still Star Wars. Worst case scenario- you get it.
This is three years before ESB. Rogue One will start mere days or weeks prior to Star Wars -- and end right before. So Mon Mothma has formal robes that she wears for important meetings in the two OT instances, roughly five and a half years apart. Whoopty. And we never saw her in the Yavin base, as was pointed out elsewhere -- so never seen in front of those lit-up tactical displays.
In this timeline, Biggs would still be in Tatooine, planning to go to the Imperial Academy.
Boy, I get tired of this! Biggs never went to -- or wanted to go to -- the Imperial Academy. He warns Luke that the Empire is nationalizing trade in the Core and it's only a matter of time before they turn their attention to the Outer Rim. He doesn't intend to wait around to be "drafted into Imperial service", so is going to jump ship and try to contact the Rebellion. Which, incidentally, calls into question the timeline of the film, as it's gonna take him some time to report to his new posting (a freighter, on which he is to serve as second mate, not a fighter pilot), travel to its next port of call, go AWOL, hook up with the Rebels, and get in good enough with them that they'll take his vouching for Luke when he shows up. So how long between when Leia's ship is attacked, and the droids get picked up/sold to the Larses?
That would be quite interesting, it's such a shame that they don't consider The Old Republic canon anymore, but it could be, I mean it can't affect the events of the saga, so why not, eh?
Curious what you're referring to, here. TOR took place thousands of years before the films. Just about anything can happen between then and now to get from the one state of galactic affairs to the other...
you know, speaking of grand admirals..wasn't admiral Dalla one, from the rouge squadron series?
she was pretty awesome..until they did a complete 180 on her character, somehow wussed her out by turning her good for no reason at all, and then making her the head of the Gallactic alliance for some reason. They ruined a perfectly good villain, that IIRC, was on the intelligence level of thrawn and far more ruthless.
One of the EU images that stick in my head all these years later was her blasting a SSD hidden inside coruscants city scape..
Wow.. Um... Okay, I thnk you need to do some refresher reading.

Daala, as originally introduced, was pretty frikkin' weak. She had innate talent, but only got her rank because she was Tarkin's mistress. That
very quickly got revised in her
next outing following the Jedi Academy Trilogy, to her having to deal with the untrue
rumors that she only got her rank because she was Tarkin's mistress, when in fact he was just the first to actually recognize and reward her military talents.
Daala was never a Grand Admiral. When we first saw her she commanded a tiny task force of four Star Destroyers. After she saw the state of the outer galaxy, post-Endor, she elevated herself to Fleet Admiral and tried to unify all the squabbling power-grabbers following the Emperor's death and, when this proved impossible, she killed them all. All this was wearing on her, and she was just about done with it all when she ran across her old flame who she originally left her homeworld to (unsuccessfully) try to find. She quit the whole war thing to resettle with him and turned things over to Pellaeon. Later, he died and their planet was being preyed on by pirates, so she got the settlers organized and took over the pirate fleet, carving out a little safe corner of space. Later, when Jacen Solo fell to the Dark Side, she brought her fleet in as Pellaeon's ace-in-the-hole, right before he died. With everything in tatters, she was asked to lead the Galactic Alliance.
Now... You referenced the Rogue Squadron books and the Super Star Destroyer hidden on Coruscant, so I think you might be getting Daala conflated with Ysanne Isard, the Director of Imperial Intelligence. "Iceheart" is a central villain in the Rogue Squadron books, and ends up fleeing Coruscant aboard the
Lusankya, the launch of which devastated hundreds of square miles of the cityscape.
I would love to see both characters rebooted into the new post-Endoe canon.
--Jonah