None of those are iconically-Epcot like Test Track. Give Guardians 30 years and we'll talk. We'll also talk about how stupid it is that it's still themed to Guardians in 30 years (actually, that conversation is probably happening sooner than that). Frozen replaced an Epcot icon, but now it has clones in two places (or soon will). Soarin' was an icon in DCA, and the original version still is, but it was always just a clone at Epcot. Living With The Land, on the other hand, is an Epcot icon.
Furthermore, Test Track replaced an OG attraction and has had staying power. I wouldn't say Mission: Space is an icon, because it's pretty much agreed that it's vastly, VASTLY inferior to what was there before.