Here is the thing these changes do not remove the frustration of being constantly behind on gold because he steals your camp then when you try to grab his as a counter you just get collapsed upon and killed by 4 people because you cannot take a buff that fast lvl 2.
For ivern to have meaningful changes he needs one of the following modifications.
1: level limiter placed on smiting. I.e he needs level 2 or 3 in order to instant smite camps, this prevents the lol took your camp and all 3 of mine lvl 1 bull.
2: Junglers who are within 900 units of ivern prevent channeling of his passive when in enemy jungle only.
3: smiting a camp slows ivern by 60% and reduces resists by 10 for 4 seconds falling off over time.
There is no reason ivern should be non interactive when it comes to camp stealing! its not a unique mechanic it is a toxic mechanic that goes against riots stated philosophy when it comes to ability balance to always allow to play around a given skill in some form.