IMO the general public feel that game studios releases games too early and then adds content later as payable DLC - content that they feel should've been included in the initial release. There's also the notion that DLCs are too frequent and contain very little to pay for.
This is definitely happening, but then the flip side is also happening. "The Last of Us" for instance is advertising it's DLC "expansion" for the game. I don't think there are many people complaining about that, because TLoU was one of (if not the) best game of 2013. It didn't last forever, but I certainly never felt cheated by the end of it... that was quite the adventure.
The backlash towards DLC that we're seeing now is due to exactly what you mentioned... games, barely finished, releasing DLC at initial release or soon after.
No doubt there will be people who but Elite Dangerous into both camps. They'll say initial release isn't worth full price, and that the expansions should be included. Then you'll get people who say the initial release is far superior to any AAA game that's come before it, and that planetary landings/EVA are worth much more than your typical old school expansion packs (And less face it, a truckload cheaper than the WoW "subscription/buy expansions too" model)
Then you'll have people like me who knew exactly what they were forking money over for when they pledged for ED, and will evaluate the value of the expansions when they're closer to release. I'm fully expecting to be screaming "SHUT UP AND TAKE MY MONEY", but will wait and see.