Wharton joined Palace in January from Blackburn Rovers.
He told Palace's website: I think I've done alright.
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I've got more minutes than I thought I would, but it is definitely a step up. I think you've got to step up, otherwise you're going to get found out, and then you won't play.
I seem to have done alright I'm still playing. I've just got to keep working hard, keep getting better and trying to help the team to get more points.
I never really come away from a game satisfied. There's always parts of my game and moments when I can do better. Obviously, no-one's perfect, so, I do look at the positives, but I'm always trying to look at the moments when I can do better.
But yeah, I feel as though I'm getting better with each game that I'm playing and I'm feeling good at the moment."