So this is the mod I am using that's been making my light discs count as throwing...
Yet the projectile itself is still melee damage, as it does not proc any throwing damage effects, like thorium's throwing guides.
Also for the whole discussion on making them melee damage again, I say this.
The thrown versions should be a seperate version from the melee ones, meaning it would be the best of both worlds, melee players would use the melee ones, throwers would use the thrown ones, then everybody is happy.