It's funny, I'm the opposite. I liked him a lot more going into it and the more we learned, the worse Jiren became. He was introduced around the same time as Kata and had the same aura as him, which was wild.
Moro was all over the place in a bad way, like Buu. He went from a goat grandpa to a weird Cell/Cooler love child.
It really robbed him of an identity IMO. Goku pulling out a perfect susano'o doesn't help that arc either