Well, 6 in 4 innings seems to have gotten Yimi demoted in spite of his 2.85 xFIP, and Liberatore has been at about a 4 xFIP over the past 2 months I believe, which given the increasing walk rate is believable. He'll be part of the future, but may not be ready just yet. Howell is pretty solid, but he DOES have a 3.76 xFIP. Nicasio seems extremely average at best, along with command issues. There's plenty of room for improvement, and like I said, the revolving reliever door seems to suggest they think so also, which is the most important part.
There is definitely a fit for the Dodgers to add some relief help imo. I doubt the Phillies would add prospects to get Puig, and upgrades are upgrades for the Dodgers. We'll see what eventually happens.