Thank you - an issue has been opened on github: https://forum.boardgamers.space/topic/191/bug-confirmation-for-wasting-science-when-advancing-to-last-step
Yeah custom would be nice.
For me, I like to play at a speed where the players are expected to be paying attention just like in any real time game. I don't want people to join my game if they are going to take 60 seconds every turn.