I think the point is well taken in how the disappointment in EotE appears to be more a marketing scheme than good game planning. I don't happen to agree, but I can see how the point is being made. Should Force and Destiny have been released first, or should Age of Rebellion have been released first? I can't say, truthfully, but I think if Force and Destiny were released first, there might have been some complaining that they couldn't play Boba Fett, Bossk, Cad Bane, or any other bounty hunter.
EotE gives us a taste of the Force/Jedi, but only a taste. It was FFG's choice to leave the full treatment until later, which is there prerogative, as they have the license. I do understand the logic. Yes, it is part marketing, but it is also part "entry point" as the majority of Episode IV's first act is in the realm of EoTE. The second act is arguably a mix of EotE and FaD material (limited), while the opening scene an the climax are firmly in the AoR material. I happen to agree with their choice, but unfortunately, I think FFG was damned if they did, and damned if they didn't.
For me, I am excited for the long term prospects for this game, given that each section is going to get a massive book treatment. Am I disappointed that I have to wait to see how the Full Jedi/Sith treatment looks? Yes. Has it prevented me from investing in the current game? No. Do I risk disappointment in the Jedi treatment in 2 years' time? Yes, although not likely given what I have already seen. Is it going to stop me from playing EotE? No.
Its solely my opinion, and I'll own it as such, that I think EotE needs to be judged on the merits of what is included and how it works as a game, rather than what they left out. I realise others may not share this opinion. I'd say if you're not wanting to buy the game, see if you can borrow someone else's copy and give what's there a read.
I should add that the beginner boxed game initially had no interest for me, as it didn't include character creation. What sold me on the game was a light flip-through of the Core Rulebook combined with an extensive read of the rules as presented in the free RPG day Shadows of Black Sun adventure. I was lucky to get the last copy the LGS had before their first shipment sold out.