You're right. None of those are actual holes. They're just stuff that people wanted but didn't get.
But at the same time, The Force Awakens did seem to hint at much more to be revealed, and we didn't get it (yet?)
No real background on Snoke, I can live with. Stuff we thought we'd get but didn't, okay. Chewy and Finn are now bit players. But if Rey's parents really were nobodies, and she's not related to the Skywalkers, then what the hell was that when she first touched Luke's light saber back at Maz's place? All the voices, including Obi-Wan's for some reason. That really seemed to indicate much more than "Oh, she's Force-sensitive and picked up vibes from it."