The NWN "port" of BG1 and BG2 was already silly, dont need another such project.
It's not a question of "need". Nothing "needs" to be made. It's going to happen regardless assuming Larian releases tools for it. The real question is "would it provide a different experience or justify it's existence". In the case of a BG1/2 remake presenting its gameplay in 3D in a turn based nature would allow it to be recontextualized in a more cinematic way. Similar to BG3. Which would likely be more appealing to a wide audience.
I want Larian Studios and any other developer studio with talent to create new games, not remake old classics that at their core cant really be improved.
I don't see Larian studios working on a BG1/2 remake primarily because it'd be an enormous amount of work. I'd rather see it done by modders similar to the NWN2 project.
Finally, about BG1 and BG2 on BG3 specifically, no I absolutely dont want to play BG1 and BG2 with D&D5 limited to maxlevel 12.
That wouldn't be a concern for modders. Modders can already extend the level cap in BG3. It's not a hard coded limitation of the engine.
Bioware was sold to EA because the owners felt they really needed to make a MMORPG and they wouldnt have the necessary funding.
According to Bioware's employees they claimed
the company was going to go out of business unless they were acquired.