Please 
#0.5 x timewarp
paper shale
radiant garden
EvenBetterTimeWarp
random zealot
I personally can't seem to think of a use for this. I know some people said making very slight adjustments but you can alter the engines to just gimble less or have a lower max thrust. I also think this makes it more cheaty rather than helpful. Fast forward is meant to save time since we all don't have days to wait to get to a planet but slowing down the game just feels like it makes it easier