Smash seems to be lacking something that would help it become more fluid and faster-paced for slower characters like Bowser and Ganon. With the way Fox can run circles around them, they need something that can allow them to continuously attack and even change direction rapidly while attacking. I came up with a new technique calling "Spin" that allows an attack to be performed while turning around, swinging the extended limb that's attacking around. You can even continue to attack and spin in the other direction if you want, increasing the spin speed and power. The downside is a risk of becoming dizzy if you do this too much(blood builds up in the head) but it should greatly help slower characters keep up with spacies and the like. Another cool feature of spin is that if someone tries to grab you when you were already spinning an attack, it actually flings them around you and off of you, countering the grab. Spin can be done from a run or even in the air and if you do a 2nd spin, you'll maintain your forward momentum. Spins are about momentum physics and if you could even change specials with them, such as turning a Falcon kick into a spin kick, there's all sorts of things that could be done with them and the execution is simply smash tilting back right after input of an attack.
Also, a vertical spin might be useful for up and down airs, allowing them to switch places. A Spin mechanic could do all sorts of things. You can all go ahead and hate on it. Knock it before you try it for artificial reasons you gave it yourself even though it doesn't have to work that way. New ideas are simply not welcome here in Meleeland.