The main issue is that Larian writers are more suited to DOS-style goofy nonsense. They’re fish out of water with this story. They should have just hired a different set of writers and let the current set work away on DOS3. The rest of the trailer is just pseudo-Hollywood style spectacle – generic tentacle crashes through some bricks, here’s a random city shot, and here’s some monsters prowling about.
This essentially sums it all.
The main issue of BG3 is Larian's vision. They just don't realize that immersion, verisimilitude and writing are equally important as gameplay.
It is impressive that they didn't need to change that much from DOS2 to do a proper BG3 (as opposed it would be from Elder Scrolls to Fallout), but they simply did a copy and paste.
Why they implemented speaking to animals/dead is completely beyond me.