I watched up to episode 56. I enjoyed season 1. However, I didn't enjoy season 2 as muh because I felt the plot kind of dragged on far too long (destroying the heart, etc). And that it didn't feel as intense and dynamic as season 1, so I figured episode 56 was a good stopping point (for reasons that would lead to spoilers).
So my question for people who have continued watching the series, is this show worth getting back into or has it gone downhill? Has the same plot has dragged on far too long, and has the show lost its luster from season 1?