I couldnt find this suggestion anywhere, so I guess I'll be first to say obvious thing.
We need set bonuses on new stuff, (pretty straightforward, hu?) I'll explain it.
Right now we have only few costumes to give set bonuses, and even less costumes with set bonus for two accessories (+ also all of tear costumes for moolah have their bonus), but I feel really sorry for all the stuff that comes to waste - capes, amazing shuriken etc. Theres really no need to wear them because set costumes are better. And all those fancy capes will be only worn once (maybe only bfp is a considerable choice), since people value utility > looks, and whoever chooses differenty might regret if afterwards. And if we'll have set bonuses for, maybe, ballons/pets and capes/new body accessories they will be equal on stats, thus look of every character on the server gonna be more unique, and also that'll make moolah hats worth buying. Well, you can really just buff up its stats, but it will only create more mess in game imo.

And one more thing, there should be pets with aspd/cast speed, not only att/def ^^