Honestly.
They are going to be complaints. The whole point is to create an open place where people are expected to point out things that are wrong with factions, or could be better. Things such as, to cite treewyrm's experience: "I have, in my own experience, never seen RP from a keeper other than Harb" And if someone can honestly say that, or anything of the sort, can you claim that there isn't a problem? I've seen many factions doing whatever they like, with never anything approaching the community imput that Keepers and phantoms attract, just by being admin controlled factions. Right now, if someone has a complaint against a faction, then there are probably others with a similar complaint, and if someone were to post said complaint, they would be told to take it to PMs, regardless of the content, which entirely defeats the purpose of having a forum.
The whole point is to bring complaints against factions, and maybe help the community become a better place, much like the point of the faction request forum in general. The only other option than this is to continue as we have before, waiting for someone to erupt in flames about a faction that they have not been allowed to question. A faction that quite possibly makes no sense. So, yes, there will be debate. People will come to the door of someone's beloved faction, and nail up their theses, and people will feel alienated by that. But anyone ignoring those theses has just made their faction that much poorer.
Disco's a great place. It could be better, and arguing against it by citing the immaturity of the community is as ludicrous as claiming that disco is a tyrany.