For me the problem is expectations, for most in this thread that's been about the expectation of the game using a more accurate implementation of D&D5E rules, but that's not a concern for me. My expectations dictate that we should be getting a Baldur's Gate game, not a 5E game. I would rather Larian hacked the 5E ruleset to pieces and came up with something more akin to a 5E interpretation of iconic gameplay and mechanics present in BG1 and 2, ideally we would have a kensai subclass for fighter and a wild mage subclass for wizard, etc and maybe Larian could even fix some of the rules travesties (subjective) and balance issues in 5E (not to suggest it is terribly balanced). When I hear the title Baldur's Gate 3, I hear "baldur's Gate sequel" but what we're getting literally does not fit the definition of what a sequel is. Different ruleset, core gameplay completely changed and a story that cannot be a continuation without retconning official 5e lore.
Plenty of people have expectations of a faithful 5E game, even though they've probably homebrewed a rule or two repeatedly themselves, when homebrew rules should have been the expectation from the get go given that it is a different kind of experience purely by nature of being a computer game instead of pen and paper. No D&D computer game has done an accurate translation of the ruleset and to have expected such should have been obviously unthinkable. Every medium change requires a property be adapted to the new medium and everyone has things they would like to change in D&D.
Expectations are a problem, but the expectations talked about in this thread aren't it.