There was something in Solasta testing that is probably worth bringing up here. Right now, one of the biggest criticisms of the latest period of testing is that magic equipment is far too common, when they were very rare in the earlier phases. But the devs went out and said that they're only this common now for testing purposes, and that they'll be scaled back to their intended rarity in the actual release.
What if the same is happening in BG3 EA? That stuff like barrels and magic arrows/food/thrown flasks are this common because EA is seemingly strictly a testing environment? After all, the rarer something is, the more likely a player will just engage in packrat behavior and just... Not use them at all. If so, we can expect an overall reduction of those in the final game... Hopefully. But if this is the path Larian is going towards, they aren't making that clear at all.
Still, this doesn't really explain things like height/backstab advantage though.
I've had that thought / held out that hope myself. But isn't consistent with the communications. While I don't have the patience to go through the panel from hell and find time stamps but you watch the panel you find Sven expressing annoyance at the DnD ruleset on multiple occasions. At one point he complains about the concession we got -- the removal of surfaces from cantrips. The statement was kinda weird and possibly revealing -- "and now I can't do that anymore since they removed surfaces from cantrips" At the time I remember thinking "they"? Aren't you "they"?
So I hold out hope that we are seeing test balloons but I think the answer to "can these be changed" will depend on how much control the CEO has over the creative process and if any of these new hires are fans of the 5th ed ruleset.\
Now to confuse matters some. I have ambivalent feelings -- there are somethings I like about Larian's vision and some things I do not. I'm annoyed at the DOS combat and the breaking of the action economy but I am also happy that Larian got the project because I agree with them on two important issues: alignment and magic items. Alignment is just fun to play and I like finding magical items. "Let's see what the boss dropped" is just fun.
I ended ToB with something like 3 scroll boxes and two potion bags full of unused potions. I had enough spare weapons to arm a legion.
TL;DR --An abundance of scrolls won't threaten the game's status as successor to Baldurs Gate 2. The deviations from the ruleset will. I hope that the cheese tactics are test balloons but it's getting harder to hold onto that hope.