People asking for 5e implementations in a 5e-game are the problem?
There are two big problems with asking for a more pure 5e experience: 1) pure 5e just doesn't work in single player videogame form. Most who will play the game will be people who never played D&D and have no idea what they are doing but unlike playing at a proper D&D table there is nobody there to explain why your character doesn't work or what you're doing wrong. Even in multiplayer most new player will play with other who are similarly new to D&D and don't know what they are doing. A pure D&D 5e in videogame form kills the game for most new players, most leave early, dissatisfied, and don't mention the game again, and if brought up they will say it is bad...this hurts the game big time in the long run. Player retention and good word of mouth are key to games succeeding and lack thereof kills games.
And then 2) if you know anything about D&D then you know the Dungeon Master has total and absolute control over the rules and is free to change the rules as he sees fit. So respect the DM(Larian).
That's why I pointed out the examples. (The majority of) People have not been asking for 100% 5e, but specific things.
Also while the DM has the option to ignore the rules and do all the homebrew they love, there is still a social contract behind each playing group. If only the DM has fun with their homebrew usually the next session will be played by them and their teddy bears sitting around the table, while the players will be doing something else.
So please, lets not oversimplify the matter. Larian can do changes and players can decide not to buy. For us who joined the EA we put trust into Larian (and that is our own personal problem not Larian's). I've learned my lesson for myself and I know that Larian isn't a DM I would play with and I probably won't when it comes to future games. I will know it for the next time and that's fine. No drama. What Larian learns from this EA and the release will be up to them.