Although I'm not a Canon head either, I am guessing that this means LFL had also reversed its decision on the status of The Force Unleashed video games. ... at least the first TFU game which I know was designated as official Canon in the SW universe. The only SW video game to have that distinction.
The Force Unleashed was at the same level of canon as Knights of the Old Republic and Battlefront, as well as the various novels. They were all officially canon at C-level, below the films and The Clone Wars.
Not quite. From the way they promoted it, it seems that The Force Unleashed game was given a status more akin to the whole 'Shadows of the Empire' multimedia project. Mostly because Lucas was said to have had "some" input at the conceptual phase.
But that's all just marketing. As far as I'm aware nothing else canon has ever made reference to the characters or events and Rebels seems set to outright contradict the whole thing sooner or later.
Mind you, as I've often said that whole tiered canon system was utterly meaningless at best. Mostly it only seemed to serve to keep the consumers happy knowing that their comics and games "mattered" in some abstract way.
Personally, it never bothered me that Kyle Katarn or Ace Azzameen might not "really" exist as far as the movies were concerned.
Just in the early days of reading the Star Wars novels & Dark Horse comics it became quickly evident that the projects often had only a passing relation to one another with each author more or less doing their own thing.
I remember reading the Zahn Trilogy followed by Dark Empire (that went unfinished for years seemingly) and then the Academy trilogy and being at a loss as to how they even related. I mean sure, they do reference the previous entries, but then go off on massive tangents, totally redefining characters and often ditching the previous author's supporting cast in favor of their own, who's were in turn also ditched by the next guy and so on.
It wasn't until the X-Wing novels that things started to get at least a little coherent, but that's also when the mediocrity began to set in.
Because they weren't stationed on Yavin IV?
Simplest answer is the best.
Yavin base only had X-Wings and Y-Wings, while the A-Wings and various other ships were elsewhere.
Return of the Jedi showed that Leia, Han and Luke weren't really leaders in the Rebellion. Mon Mothma and her people were running the whole thing and they were just part of that. It's possible that they were the underfunded part of the Rebellion and just scrapping by with what they could get.
Leia at least was clearly a leader in the rebellion as we saw in both ANH and TESB. Luke on the other had certainly became a leadership figure in the sense that he held the rank of commander and led a squadron. I think it's fair to assume that both of them took a leave of absence during the year or so they spent trying to get Han back, which accounts for why Leia wasn't involved in the planning of the Endor mission.
I think it's fair to assume that Mon Mothma's absence in ANH probably has something to do with the senate having recently been dissolved. Odds are she was either arrested and later broken out by the Alliance, or already on the run when Alderaan was destroyed. By TESB I would speculate that she was probably either with the fleet or being smuggled from system to system, talking to wavering planetary leaders and recruiting worlds into the Alliance.