This is like taking a game like Dark Souls 3 by a new dev studio, tweaking the existing game mechanics, and then calling the "new" game Elder Scrolls 6, even thought actually the game should be called DS4.
This is similar to Bethesda taking Fallout franchise and building Fallout 3 and 4 on the existing Elders Scrolls 4 mechanics. The difference is that this BG3 will not work as intended because BG2 fans are very specific about what they like and why they like BG and BG2 so much.
A better fit would be is Wotc hired Obsidian because PoE is much more like BG then DoS.
My gut feeling is that Wotc simply didnt want to spend a lot of money on development of a new BG3, so they just said to Larian hey can you make BG3 from DoS2, and what would be the price.
The game has not really been in development a very long time, which means they are trying to make a some money by not investing a whole lot.
Hope for all the best for Larian, but this was a cheap move in my book.
Perfect comment I always imagined BG3 similar to Obsidian games
