Awesome! It’s funny how such small changes like that make such a huge difference. Humans are of course analogue and so anything digital in movement tends to feel wrong. Have you experimented with where the player character is in the frame at at all? It might look better with the character aligned to the rule of thirds. Of course, it may not work for you game, but it’s quick to try 
I don’t have any more easy wins on that front I’m afraid - those ones have come from my own experience in platformers just feeling a bit off and not knowing quite why. Glad that helped you out anyway. I’d just keep working on whatever motivates you, and then decide how you make the camera/controls compliment that