Well, I definitely liked having Deborah Ann Woll on my screen but beyond that I was neutral on Karen. Foggy I liked in S1 but in season two he became way too whiny (I genuinely don't remember a single thing about him in S3).
For Elektra, I've always felt like once the focus shifts from Punisher to her the quality of S2 instantly plummets. They speedrun through her arc way too quickly; in the span of like 6 episodes she goes from returning old flame for Matt, to assassin, to the reveal that she's actually part of Stick's group, and then finally the Hand's weird messiah. I also didn't care for Elodie Yung in the role.