Nice bit of backstory for Shinji. His Aunt & Uncle were nice enough to him (well, except for not letting him under the umbrella), but there was a palpable distance between them. They built him a room, but it was outside and away from the rest of the family. His cousin, shown behind the parents, was a probably an enviable existence for Shinji.
Him using Gendo's name says a lot, he wanted his father to be there for him, just like he wanted his father to say the words of encouragement Misato did back in chapter 6. I'm thinking this was also the first time Shinji's mother has been brought up in the manga?
Anyway, I liked this. In the anime, you never get to see what life was like for Shinji before he came to Tokyo-3. So, yeah, this was nice.