Here is a ideea to fix int sion(aka demolish changes so it wont be abused early anymore)

Its the almost the same as or constantly running it down top to distract you,hell just ask the guy with a knockback or pull to get sion away form the tower after he dies. with demolish can be just as bad or worse since he will kill someone almost every time due to the +ult combo not to mention increasing demolish damage too,in the end its demolish that makes this strategy broken so just nerf its early game potential by removing its base damage and change it to 30% bonus health scaling at the start and going up 45-50% at somewhere between 15 to 25 minutes and have it activate at 5 hits on the tower instead of after a few seconds of proximity so its riskier to go for the it early I think like this split pushing as a tank will still work but be quite weak till later in the game when the enemy team wont need 3 people to stop it