The fact that Taliesin Jaffe very deliberately cast a spell that would start destroying Molly’s body even faster than normal means that it was his decision not to bring Molly back. Taliesin said his goodbyes to Mollymauk and is moving on. He’s even doing the kindest thing he can do for Molly and making sure his body doesn’t rise again as an empty and lost shell, alone and in pain.
Don’t go on about how they didn’t ‘try’. There was nothing to try. They have no spell components and no ability to cast powerful enough rez spells. And Taliesin made sure that nobody else would be able to try with Clay’s decompose spell (which isn’t a spell in 5e, no, but it IS a spell in Pathfinder, the game they all played originally. Matt homebrews plenty of shit). That’s Taliesin’s choice to make and no one else’s.
Rest in peace Mollymauk, you were loved and always will be.
(go get you some good dick from Vax in the afterlife)