Hmm, you make it sound as if there was an entire army of unemployed mod authors hanging around here desperately searching for ideas what they could create next.
Usually the authors hanging around here are here because they're already working on something of their own ideas and want to share their progress or final creations.
Some also aim to gather feedback to their initial plans or ideas on how to refine them further. (I'm one of those, so I know they exist.)
The number of mod authors 'not' working on anything of their own volition already and instead only waiting for an interesting request they could fulfill to come up actually is indefinitely small in comparison.
Don't get me wrong, I'm all for better organization and/or categorization even for such insignificant-in-comparison things as mod requests. (Well, who am I kidding? I myself loved to fulfill requests which were of interest to me whenever I needed a welcome distraction from my usual projects, or at least when I was still able to do that amount of modding in my free time.) But just so you know, you already managed to lash out at and offend a good number of those select few who actually may have been able to fulfill your requests or those of others.
The thing is, they were totally right. If there are authors desperately searching for ideas they could make real, they will go as far as down to the last page with unread posts on it, to not miss anything potentially valuable to them, or they will even have subscribed to the mod requests forums of their interest as well already.
But those who aren't, you can be bloody sure, won't even look at the first page of the requests forum to begin with, and will never even notice any changes to its organization done inside.
People seem to have an entirely wrong grasp of the whole Mod Requests idea recently. Sure you can post your ideas inside there, and sure 'some' of them are taken up by interested authors and made real, but it's not like there's an entire Mod Request Force standing ready for any new requests coming up and they need to be totally made aware of your request or it'll never be taken up. As a matter of fact, most requests never will, but not because nobody is aware of them, because who is interested in fulfilling mod requests also knows how to find the ones of interest to himself, but because simply only very few are of interest to the select few authors randomly checking in there in search for new ideas.
Posting a request in there and 'expecting' to get a response from an author jumping in in joy to make it real in only a short time is totally delusional. Yet an incredibly huge number of requestees seems to think that's the way it's going to be. And they slowly start to annoy and scare away the select few authors actually checking in there from time to time already, until there's nobody left interested in fulfilling the wishes of those "My ideas are the very best and everybody totally has to make them real!!"-kind of folks anymore, who in most cases additionally fail to realize their proposed ideas are either 'impossible' to achieve in the game they're asking for, or at least incredibly hard and complex and can only be done by a select few authors at all, who are also already working on their own projects in the meantime.
That said, I'm all for categorizing Mod Requests further. But don't underestimate the incredible amount of work your proposed idea means for the only 6 staff members to sift through and sort all mod requests of all games there are and will be in the future, while the actual number of these keeps exponentially rising with each day. Let's not forget they have other, more important tasks to fulfill as well besides of this little feature which will only benefit a tiny fracture of the member base to begin with.