There's basically nothing else worth replaying for
If it's worth for replaying is in the eye of the beholder. I've played it again and didn't regret.
There are several new scenes and in this case the storyline - timeline changed a bit too.
e.g. new girls, nice to see at, but not many new sex scenes,
but this is a comic (sex-)adventure game and not a click-fuck-game,
where you have sex in every room only on enter it.
And as
JoyRideX said: "... old saves can't be used after updates, due to the many changes."
... so you maybe didn't saw the new scenes, if you've used an old save.
I can only recommend - give it a try
PS: I found the save files on 2 locations
1.) C:\Users\#username\AppData\Roaming\RenPy\SpaceRescue-##
2.) inside the game folder SRCP_5_5-January_2021-5.5-pc\game\saves
I made a more or less
° clear save with asteroid game finished with 13 and 15 waves.
° so nothing more than the most necessary dialogues with Lune
Extract it into the folder(s) as mentioned above and as the filename might suggest,
the save can be found afterwards within the game on the 9th page.
... I wanted to avoid conflicts with the existing saved games.
View attachment 9-6-LT1.zip