How long to wait before cutting bait?

I drafted three top DLs: Bosa, Chandler and Campbell.

I gave up on Bosa and got Myles Garrett.

On paper I should be doing great with my DLs, but Chandler and Campbell have been underwhelming (Campbell did have one good game). Am I being impatient wanting to dump Chandler and or Campbell for the likes of Buckner, Hunt, McKinley, Clowney, Reed or Dee Ford all who seem to be performing well and getting pts each week and are on the waiver wire of my league?

Should I wait ONE MORE WEEK on the two studs on paper, or time to go for new blood?

Is this a keeper league or a redraft league? I'd wait as you have the right guys. I am going through the same thing with Melvin Ingram right now, but I'm convinced he'll turn it around soon. I've seen too many IDP players have a good week or two and disappear. The studs usually get there's eventually. I'm .500 right now in my league, so I can afford to wait a little longer, but not much. McKinley and Reed seem to be the ones who have impressed me the most out of your free agent group below. I assume they'll also maintain their long term value.