What Sion wants

Sion is in a bit of a bad spot right now, but there are some reasonable changes that could be made to his kit to put him back on track. Please note that not all of these changes should be made together. Some combination of them, though, would help him out tremendously.
PASSIVE There are a number of valid suggestions about changes to his passive floating around out there. These seem to be the most popular:
- Change the attack speed buff to be a bonus instead of a set attack speed so that Sion isn't penalized if he has purchased attack speed items like trinity force.
- Give Death Surge a similar effect to quicksilver sash so that Sion can overcome initial cc used on him.
- If Sion kills a champion, have him reset his life loss and refill his life bar to full.
- If Sion kills a champion, have him come back to life a la guardian angel
DECIMATING SMASH A common wish is for the damage reductions on minions and/or monsters to be reduced somewhat, but otherwise most Sion mains agree that this skill is in a pretty good place.
SOUL FURNACE This skill was nerfed during cinderhulk's heyday, and most mains agree that changes here are probably the most important to returning Sion to viability.
- Completely revert the nerfs to W (10% max health ratio at all ranks, 2 second detonation trigger)
- Scale the detonation trigger time with level from the current 3s at level 1 to 2s at level 5
- Have a reduced strength detonation if the shield is popped from damage, such as a 50% damage explosion
- Increase the AP ratios so Sion can be a wizard again.
ROAR OF THE SLAYER Most Sion mains agree that the nerfs to this skill were justified. The 35 mana 315 damage long-range poke was stupidly overpowered. That said, there are some changes that have been suggested. I personally feel the skill is in a good place right now, but here you go:
- Increase the armor shred on the primary target at higher levels (e.g. 20/25/30/35/40%)
- Increase the AP ratio so Sion can be a wizard again.
UNSTOPPABLE ONSLAUGHT His ultimate has had a number of creative suggestions made. Some may have even been tried by Riot already:
- Have Sion keep running if his ult kills a champion
- Make it destroy or ignore player-generated terrain, especially once it is at full speed
- Extend Sion's cc immunity for half-a-second after the ult collides with a champion
- Give the frontal cone of the ultimate some kind of Braum shield effect to counter projectiles/aoe zones as though sion destroyed the effect
- Increase the maximum speed based on the player's bonus speed so that it is harder to avoid
- Don't increase the max speed but increase the turning speed based on player bonus speed so that it is easier to aim
Thank you for talking the time to read this. Hopefully some good can come of it.