I dont think they should change one thing in back to the 80s. Not one thing. They don't change ATG1 or 2003 or 2004. These games are done.
For so long as we request changes to back to the 80s there is no chance at another mystery card game. ( I would prefer back to 95-05 but back to the 90s or 70s would be fine-but newer players would bring in more players and $ I think).
If we were to be told that there was no chance at another mystery card game, then we can ask for improvements to the one we have, but i would prefer the programmers spent their time on a new game. The engine is already there, all it would take would be imputing new cards. I would be hapier with a new mystery card game wih all the flaws and minuses of back to the 80s than a couple more minor tweaks and players to the back to the 80s game.