Yeah, the Index anime is pretty mid altho people tell me the light novel is better. I think all three seasons have rushed adaptation problems.

And I agree that Railgun's a lot better because it's more focused on it's premise (CGDCT's but they have X-men powers), and as someone who read the manga all the anime only changes they made honestly made it a better story (Saten having a bigger role, etc.)... and all the best parts of Index end up in Railgun anyway with better characters lol.