I liked Cole being good being the canon endings for Infamous 1 & 2, given who he was and his exterior appearance and his origin story.
Deslin going evil in Second Son though, that has far more potential given the nature of his powers, he's literally a god among conduits!
Gameplay wise, I enjoyed Infamous 2 more the Second Son. The focus on multi-powers over just Cole's electricity was a downgrade, I feel like it was simply made that way because they wanted to show off the PS4's potential/graphics/lighting effects at the time. Cole's powers in Infamous 2 are way more fun. Second Son got a pass because it made traversing the city even easier when you get Fetch's powers.
That said I really just loved this series and hope we get another one, I 100%'d Second Son's achievements which was the first game I ever did that for.
Also still hoping we get a remastered Infamous 1/2 edition. I want to see Cole's electricity with some next gen particle effects Sucker Punch!