Aye. Organizing suggestions is hard. we remember that from when we made [url=https://www.roleplayerguild.com/topics/83669-planned-features-and-common-suggestions]this[/url]. A subforum sounds like a good idea.
And for that sub-forum, perhaps use a simple copy of the tag system, where the tags are relevant to the sub-forum's purpose?
with tags like:
bug
new feature
feature improvement

could also have tags for complexity of feature?
complex
simple

not sure if it would be wise to have tags for which aspect of the guild it affects?