I think Lewis has more value than Julien and I believe in Lewis' overall game more than Julien. His inability to stay healthy is what bothers me. I see Julien as an Arraez type with more pop, which I appreciate and like, but his glove bothers me. I think Lee has upside over both, which is why I'd keep him. That said, I wouldn't deal Lewis for just anyone either. I wouldn't necessarily shop Julien either, but I'd certainly listen.
Give me an infield of Lee, Correa and Lewis and I'd be ecstatic regardless of who is at 1B.