If we had purpose made places for every individual suggestion on Mayhem we would have hundreds of them and it would be a nightmare trying to find what you wanted amongst the huge numbers of headings we would end up with.
Just to clarify a point here as well, no-one is ever shot down in a cloud of smoke, we welcome and evaluate all suggestions for the way Mayhem looks but we don't necessarily have to implement every suggestion. We weigh it against the requirements of the other 4000 members to see if it is the right thing to do for everyone. It is also interesting to note just how enthusiastically suggestions are made for new headings but how quickly that enthusiasm evaporates when the heading is added and people can't be bothered to add to it any more so it ends up becoming another dead heading cluttering up the rest of the board.
Don't forget we also have the masterclass section for models of an exceptional standard however these have to be supported by a particularly informative and instructive build thread as well. Over the last couple of years the format we have seems to have worked particularly well and worked for most of the members most of the time.
As Peter quite rightly points out we could simply add some items to the thread we already have or even start a new similar one.