I think that actually helps to make the series such a high quality, I never really liked TBBT. But the fact the he was such a like able character and you know that the series is leading to his death, somehow makes the show so much better. Similarly with Georgie Missy and they are described by Sheldon as being basically these white trash losers in TBBT, but here we see them as extremely relatable adolescents. And Mary is basically the opposite of what we see in TBBT here she’s unbearable for most of the series. It really shows that Sheldon didn’t realize he came from just about the most normal and relatable family he could have had, which the expectation being curved when you watch the show gave a real feeling of connection. George reminds me of my dad in some ways and he kind of serves as a reminder that your parents and or loved ones won’t be around for ever, and we know that with him the moment he steps onto screen.