You know whats most annoying about sion's passive
You first need to die, ok so you are dead now you can use passive.
Everyone has 800 movespeed because items . Everyone has gapclosers because mobility creep. Everyone has slows because mobility creep. Alot of champions have hard cc. Your passive dies faster scaling with levels .
Like how are you ever going to get anywhere near someone. Also since your passive dies faster with levels the only way to use it is to get tanky, guess what this makes it harder for you to die and use your passive.
It is such a frustrating passive as you either don't get to use it at all or you die often which usually means you are behind and this makes it difficult to use it aswell.
If people get any armor at all (which they get simply from leveling up) the damage you deal with it gets kinda weak too, god forbid they have an actual armor item then you can't touch them at all, unless you get armorpenetration.
The passive is kind of funny and i like the idea but it just doesn't seem to be all that great past level 6 and dieing before 6 isn't really what you want either.
I know it should not be a guaranteed pentakill but as it is now its downright useless It really needs to be alot more treathening, it is way too easy to deal with.

and stumbling around during the duration.