I think keeping it open until Wednesday or agreeing in secret is smart. I think the fielding of offers actually ended weeks ago but GS still thinks they can make a play. I think we know they either don't have enough or won't give enough and had some convos with other teams and likely know what could be on the table if Lauri extends and is traded later (this season or most likely next offseason). I think we'd see some "Lauri kinda pissed" type of reports from his camp if they weren't on or very close to the same page.
So far what we've heard from Lauri's camp is: He loves Utah, his family loves Utah, he does not want to get traded mid season so he doesn't want to sign the R&E until the 7th.