Questions are typically asked in #general-lounge or #report-to-staff, depending on the type of question.
As for a #suggestions channel, well if you have suggestions for our Discord server, then they can go in this Suggestions sub-forum. Most people who use the Discord use the forums too, so it may be a bit repetitive to have both this and a #suggestions channel. However, people may prefer to just quickly give out ideas and discuss them, as opposed to creating a whole thread on it and waiting for a response. So overall, my only concerns are it being repetitive, however given we already have parallels between forum sections and Discord channels, along with the appeal people may have of wanting to quickly give out suggestions & discuss them on the Discord, I think this may be a worthwhile idea.