I would love it if there were machines which can cryogenically treat most metals to massively improve their stats, like which exist in real life to reduce tool and active part wear by ~5x. Default recipes can be added and modified and capability supporting mods can add their own, like cryotreating the center ingot of a steel pickaxe similarly to how a Traditional Katana is laminated.
See Thoughtco's "An Introduction to Cryogenic Hardening of Metal" at https://www.thoughtco.com/cryogenic-hardening-2340006
"Besides steel, cryogenic hardening is also used to treat cast iron, copper alloys, aluminum, and magnesium. The process can improve the wear life of these types of metal parts by factors of two to six."
P.S. If you find that this mod, Pipeworks, Mesecons, Digilines, or others lag your machine and the server by lacking optimization, there are projects to fix some of these mods like technic-plus, even though some of the measures impact gameplay due to the limitations of the LuaJIT addon subsystem.
The ability to define a ghost layout for items that can't be modified or sorted by the locked-to player would be nice for organization. I had all my stuff laid out in a certain way and someone came through and clicked the sort button to mess it all up.
I also suggested this layout mechanism for the renting and loaning mod.