Complex sentence: This is a work in progress, but it'll eventually host what I hope will be a proposal to allow for the addition of a "viewer" right to trusted editors, to consist of only and.
Split into simpler sentences: This is a work in progress, but it'll eventually host what I hope will be any proposals I come up with to allow for the addition of some rights to trusted editors. This proposal is for the creation of a "viewer" userright to consist of only and.