And those L1 stats are slightly misleading - it's not often you have a team down there who gets over 30,000 (Sunderland).
I've always thought that apart from a handful of genuinely big teams who shouldn't really be there, L1 isn't all that different from L2. It just feels better because it's one higher. As you say, the jump from L1 to the Championship is absolutely massive, in terms of quality, support, and the money required to compete.
I don't expect to be too shocked by a drop in quality in the National League. Most of our players would struggle to get games in that division anyway, so it's not like we're used to anything better. In fact, we've been picking up non-league-quality players for years now.