I'd hardly call that particularly newsworthy, beyond I suppose the implicit vote of confidence for what they already have in the can meriting a second season. Also I dispute the assertion that Kenobi didn't end with any kind or room for a follow-up. I mean he literally said "if you need me again, you know where to find me." Granted it's very easy to interpret that as set-up for Rogue One & ANH, but still, between that and that literal last minute cameo; hardly a definitive cut-off if they later decide on a follow-up. Indeed with young Leia being such a relative hit with the fans, I wouldn't be shocked if they brought her back in a few years for a young Leia show, which one might characterise as a spin-off of sorts (though that's a dubious terms when dealing with already legacy characters.) Side note: Wasn't Mano also originally touted as a "limited series" or some similarly ambiguous terms? Seems like it mostly just marketing hedging their bets so if a new thing isn't a hit, they can just say it was always intended as a stand-alone than have to come out and say a thing was cancelled. That doesn't apply to Andor of course since that very much was designed to be a multi-season story, but with a definitive beginning and end. No real way of spinning that one. On the other hand, I'm pretty sure the announcement of a second season didn't come until late in production, so they may have indeed waited until they saw what they had before making and broader plans public.
Not to surprised to see this go in that direction, I would have been more shocked if it stayed as a limited series. With the character being so popular, and her fate at this point being wide open, it makes sense they'd want to get more than just 8 or 10, or however many episodes Season 1 will be, out of her first solo series.
They have a roughly 25 year gap before The Force Awakens-The Rise of Skywalker...so they have a lot of potential space to put any stories that they want to tell in the New Republic era. A lot can happen even if it is not happening to the fabled Heroes of Yavin. Even if the scale is nowhere near Galactic Civil War standards of the Skywalker Saga trilogies.
Spoiler: The Mandalorian Season 3 Premiere I wonder if the appearance by the Purgill in today's The Mandalorian premiere, was the start of setting them up for their role Thrawn and Ezra's storyline in this.
Wonder if they would do the like "previously on Star Wars" with scenes from The Clone Wars and Rebels, or so live action version of key scenes.