I do kinda wanna fix Leo and Reyna/Nico's arcs, because they had something going until Nico met Will, Leo kinda starting being a d*** and met Calypso, and Reyna joining the hunters. Plus, I wish Hazel and Frank got more time, because IDEK what Hazel's arc was, and Frank's arc was stupid. But Piper is the easy choice just because her arc was some 💩
(Wow that was long)