I haven't played both of those mods yet, so I'm not that knowledgeable in them. (Although I did watch a couple playthroughs on youtube.)
I think a "Krastio + SE Galore" mod would fit quite well for exactly the reasons you already listed. I can't really add a lot to that because of my lack of knowledge, except that just like with Space Age Galore, it will be quite hard and time intensive to balance around how different materials will be more/less plentiful on certain environments. But besides that, I see no issue.
Although you didn't specifically ask... I would myself not make that mod. I have never played both mods yet, but I don't think I will like the mods enough for me to make a Galore mod supplementing them.
More Galore entries are planned though. Angels Galore (an Angels Mods overhaul) was actually almost ready to publish.., until the Angels dev team removed the gameplay mode my mod relied on, which broke it moderately irreparably... (I will still continue working on it nevertheless... I like Angels Mods alot :D)
Thanks for asking! :D