riftherald needs to take double CC effects.
that thing is a monster to take down (pun intended) and commands a full team in its direct opposition. its not something you set it and forget about, you follow it and the enemy dont get to tackle the herald at all if theres anyone escorting it.
so now the enemy team is forced into a situation "do we want to pull from our other 2 lanes (guaranteeing 2 towers for the enemy team) or sacrifice t1 + t2 in the lane its in or potentially more."
rift herald needs many many more checks and id be surprised if it didn't already have a ridiculous 80%+ win rate just for taking it.
its so much stronger than baron is.
an alternative to double CC would be a lesser range, because i believe it can run the full length, inhibitor to inhibitor, give it a zz rot range instead so its max 2 turrets (unless you basically summon it under the t1 turret where you could be interrupted)