For example, I must have seen about 10 different gameplay overhaul mods, 10 different new armor mods and countless others which essentially are 'duplicates'. Obviously they are not entirely 'duplicates' but many of them share the same foundations. If you guys would just get together and fuse your projects, I'm sure that after some mediation and compromise you would be able to agree on a set project direction and who knows what your projects could end up leading into.
Anyhow, it's just a suggestion based on some months of observations. And I just hate to see manpower wasted..

I'll add with a simple word...variety. sure as you said many mods go along the same concept, many gameplay mods for instance. but "how" they do it goes along way, from packaging, being modular, compatibility things like that.