That's not right at all. While I'm sure there are plenty of studios who could handle Baldur's Gate 3, Larian is absolutely one of them. By giving them feedback on how unfun their 5E changes are, we stand to convince them to change them. Advantage is a powerful mechanic in 5E and they surely will see that their house rules are handing it out too easily, among other things.
Won't happen. They are married to their surface combat gimmick combat system, both by the engine they use and the design they prefer and now it is too late to change it as they would need to throw out and reinvest a lot of work. Same for their story which depends on special snowflake origin characters instead of regular NPCs.
If modders are already on the job, I'm sure it's possible for Larian itself to fix it to be more like 5E. The only thing they seem absolutely unwilling to add in are planned reactions (which, granted, is a critical part of how 5E works).
