I don't see how adding varied items to packs makes just opening them instead of playing sealed / draft / evo with them any more appealing. I can still get more value / play time from my packs by playing with them.
Bully for you. I used to buy at least 2 cases of every Magic set at each release just to seed my collection for constructed and foil chance. In fact, that's so important to the ecosystem they have started adding a higher rarity to nearly every set. If you can't see the value in it, that is so, so far outside of my concern.
Right now I literally seed my Hex collection through drafting or the auction house. That is of zero help to the business with each release as my behavior does not change in a more profitable way.
Most all of the CCGs where people just buy packs all the time to open them that is literally all you can do with them.
I uh, that didn't at all answer my question?
Edit: I suppose I should be more clear, there's only one other CCG that matters. It's called Magic. As Hearthstone has no trading ecosystem, there's no collectibility to it. Pretty sure even Elder Scrolls got "foils" (animated cards) right. But I could be wrong as it's just 2 lane Hearthstone so I haven't bothered spending money on it.