I remember the theory back when they made season 3 was that they were just rushing through it to get to the really good stuff. Either that was never true, or season 3 flopped so damn badly it dissuaded them from continuing.
I stopped watching Index because of Crunchyroll. Choosing to use "sissy" as a translation for "onee-sama" was among the MANY things that made the series completely unbearable to watch.
There IS a "fixed" pirate version that just keeps it as onee-sama (and fixes a few other of Crunchyroll's "genius" lol-cow-lization choices), but at that point, you're going through a lot of extra effort.
I stopped watching Index because of Crunchyroll. Choosing to use "sissy" as a translation for "onee-sama" was among the MANY things that made the series completely unbearable to watch.
There IS a "fixed" pirate version that just keeps it as onee-sama (and fixes a few other of Crunchyroll's "genius" lol-cow-lization choices), but at that point, you're going through a lot of extra effort.
Downloading fansubs from nyaa really doesn't take much extra effort in my opinion. But yeah sissy is absolutely unforgivable.