Looks like some subtle, well-thought-out tweaks and improvements. Some of your changes I did in a similar vein in personal mods, but without those sophisticated extras you realised. The ironsight functionality seems interesting, might work great with Doom 3's slower paced combat. Unfortunately I can't check your mod out at the moment becuase I'm currently stuck with my work notebook, no Doom 3 installed...
Don't let stupid Youtube comments disencourage you, you always release quality stuff!