PRO: you get guys to help now and some nice dynasty material moving forward. If you do not turn it around, you get a better pick.
CON: you have two good WR who are out for now, but one is coming back in a couple weeks. Zeke probably has enough left that he can still help out the next couple years. If this year keeps sucking for your squad, you have solid pieces for next year once healthy and a good pick position.
As much as I personally love the WR core of Godwin / DJM / Sutton / Chark / Gallup, the balance of keeping Zeke is probably better than adding Gaskin / Mostart who might not have their gigs next season. Sure, they might but it feels like they will not to me. Zeke will be there and Mixon will be fine by next year at least.
It sucks losing but I think your team moving forward is stronger as is. Either way, if it doesn’t turn around you get better picks so I’d keep my studs and settle in for a long season. Plus, Godwin / Chark returning might be enough to save you although I’d rather go for a plummet and better draft position if you lose week 4.