2.0 also went off in a very different direction, I think. There are lots of differences, both glaring and subtle. And don’t forget Mari! :)
Yeah, it’s more like…
1.0 - Condensed Remake of First 6 Episodes
2.0 - Episodes 8 - 23 Diverging Plotlines
3.0 - Uh… Episode 24 + lolwhat?!?!