all we have seen so far is the pre alpha of Baldur's Gate 3 you can hardly make a judgment on a game when it is still in it's pre alpha stage
Quite; and as has been pointed out repeatedly. I'm still not entirely sure what BG is "supposed" to look like anyway, having only seen a tangential debate about whether or not it's supposed to be "grimdark", and not unreasonable observations that it's perhaps largely futile endeavour to try to transpose 20+ year old graphics to a different generation of games.
But at this point it seems to mostly be going round in circles with BG/DOS comparisons being little more than "yes it is/no it isn't".
No, its actually pretty straightforward:
First, BG3 should not look like DOS1 and/or DOS2.
Second, BG3 should have its own visual identity, with "resemblance" to what has been seen in BG1 and 2.
Third, yes it should be grimdark, and no, don't see a problem with transposing a style of a game 20 years old (look what they did to DOOM for example)