I may be condescending but while I don't care for GNOME 3 Shell either I think that stating so plainly is sufficient, one doesn't need to go fishing for procedural reasons to reinforce ones opinion. I don't think you can successfully argue that having available, dedicated resources for maintaining a software project shouldn't be a criteria for a distribution accepting it and making it part of the default, whether this is written in a procedural manual or not.
If you don't like GNOME 3 Shell just stand up and say so, no need to beat around the bush.