FO did this. In the mid 90s. WL did this. Larian's own DOS games did this. DA series did this to varying degrees. KOTOR series did this in spades. This is the whole point of crpgs - your character gets different ways to do things. This isn't innovation. That's not an insult to Larian as it is good that they are doing it but innovation means 'new' or 'never done before' not 'more of' or 'slightly improved'.

In FO, you can literally plant bombs on npcs. You can sneak around. You can convince the 'main villain' to blow himself up.

Early on you get a quest to deal with some radscorpions. The easy way through is just kill but you can simply plant a bomb at the entrance and complete the quest. An early bandit camp can literally be solved under the right circumtsances/stats by pretending to be the 'ghost' of the leader's father who he had murdered.

I'm looking forward to the different ways to complete quests but it is not innovative to do what crpgs are supposed to do.

----

Millions of people play 5e. There are ceterainly more than hundreds that want as 'pure to 5e dnd as much possible'. I personally know dozens myself who would want it as 'pure as possible'. I guessing over half the audience for BG3 are dnd players. The BG fanbase alone is in the millions.

Now many players play the pre game release? I bet a good chunk of them were 'hardcore' dnd players mized in with 'hardcore larian' fans. I doubt casuals even bothered with it. I skipped it to avoid spoilers as much as possible.

Do not underestimate the dnd fanbase.