You are correct that that ship has not been Revolutionized so does not include the sun deck. I wouldn't expect you would get much use of the sun deck on an Alaska itinerary anyway. Those upper forward looking decks are there, they are now just available to everyone and are just open deck with loungers.
The Retreat Lounge is still called Michaels Club but that's not an issue as the name change was just marketing, still a private lounge for suite guests.