Outright tier upgrades wont be added but there can be higher tier weapons as variants based on rare resources.

Example;
Vanilla armor hardener's description talks about armor having a crystal lattice.

With last update i made carbon reinforcement that increases hull strength fill the role of T3 of crystal hull plating. It even is bound to their tech tree now.

So am planning things like Carbon internal layer, a take on internal armor layer that reinforces hull... Essentially a carbonplatinum reinforcement "hull module" for aux slot that gives % stats instead of baseline's static values.