There's two accessories that greatly increase mobility in pre-hardmode: the Horseshoe Balloon, and the Frostspark Boots. Of course, once Hardmode is activated and you can make wings, a lot of their functions are obsolete. Some of them are still useful though, namely the double-jump effect and the fast running speed. These two effects are created by a component in each of those accessories: the Hermes Boots, and the Cloud in a Bottle.
The problem is, there's no way to combine those two effects into one item, because they can already each be combined with other items. Except, those other items are all things that are obsolete if you have wings. So if you want just those two effects, you have to use two accessory slots instead of just one.
How about making an accessory that combines the Hermes Boots with the Cloud in a Bottle (or the Bunch of Balloons, for that matter), so you can actually get the parts that are still useful, and not be wasting accessory slots when Hardmode starts?
The problem is, there's no way to combine those two effects into one item, because they can already each be combined with other items. Except, those other items are all things that are obsolete if you have wings. So if you want just those two effects, you have to use two accessory slots instead of just one.
How about making an accessory that combines the Hermes Boots with the Cloud in a Bottle (or the Bunch of Balloons, for that matter), so you can actually get the parts that are still useful, and not be wasting accessory slots when Hardmode starts?