In terms of how closely it resembles 5e, the current situation is that it barely does at all. There's so much homebrew that is so very prominent in the game that it overbears everything else, and large swathes of the actual 5e ruleset aren't implemented at all.
Well, it's still much closer to actual DnD than BG1,2 or NWN1,2, considering that you have access to social spells like Disguise Self, Detect Thoughts or Speak with Dead that actually do something. Homebrew rules are used mostly for combat.
There's been a lot of kick back about this, but thus far Larian have stuck to their guns about their opinion that 5e doesn't make for a good video game, and that their rules are better. It may change, it may not.
It is changing a little with every patch. Larian got rid of cantrips creating surfaces, now they made Disengage a proper action, some people also noticed that backstab homebrew is gone.
https://www.reddit.com/r/BaldursGat...e_theyve_removed_backstab_autoadvantage/
