Very interesting and sensible post!
Id agree with dropping Dunn for Moore who has looked great.
Id retain Welker though, I prefer him over Meachem right now. If NEP replace Cassel or if he improves, I can see Welker rebounding.
When Colston returns, you dont wanna be loaded with all the Saints WR, esp for the week 9 ( Colston MAY be back by week 8).