I remember when I first Installed Elder Scrolls Online about 3-4 years ago and was shocked it was 100GB. I don't really think 80 is that bad. Especially when I just put in a 4TB secondary drive. If you don't have a couple 4TB drives in your PC now, you're in trouble IMHO.
As for BL3, it's actually fairly decent. The story is really bad (I don't want to spoil it, but the "twists" in it are really ridiculous and fanfic-level dumb) but the actual shooting mechanics are incredible and the loot drops a lot better than the other games. Lots of legendaries, ala Diablo 3.