When we say "suggestion" here, we mean "ideas expanded and can easily be presented to the developers for perusal, preferably with most, if not all, of the details worked out", not "random ideas that I just had and I have two sentences to round it up". I mean, a few things can work for the latter, but those are usually for small changes. But something that adds to the gameplay/combat usually falls under the former. Lots of balancing and working out something fun. This currently lacks a load of details.
Look around the suggestion section and see how others do it. The ones that generally have people's support.