Well when it comes to shipping Snowbarry my answer is Always.
As for Iris I believe Wally will save her, also its interesting that almost everything the writers said about Wally is turning out to be false.
Like I think they said it would be awhile before Wally joined Team Flash, same with his powers, I think they said it would be awhile but look all of a sudden he's got powers, and a Kid Flash suit.
If anyone is leaving The Flash I believe its Barry I mean why all of sudden rush on Wally and WestAllen?