I like that they implemented the optional facing rule from the PHB. It adds a little more action to the game, and considerations.
On the flip side they are also good at using the disadvantage on darkness rules etc.
This is one of the "not like 5e" rules that I like. (Besides it IS a 5e rule, that many just don't use). At least Advantage speeds up combat.
But they not implemented the facing rule. If they really did, enemies should use their reaction to change orientation when you are moving around them. This is quite important part of the facing rule.
I don't really agree it's very important, and one of the parts of the rule that is a bit iffy considering how movement works in DnD. The facing rule always end up being the "no attacks of opportunity rule" honestly.
At the table top my group reversed it: You can use your reaction to preform a help action. That way you still get some access to advantage.
Of course one can argue if advantage is needed etc. I personally think it makes the game more fun to play as it is in BG3 than without advantage. We can argue about if it's "realistic" but trunbased is always an abstraction anyways.
To me it's the easiest implementation that works, and adds some dynamics to combat, where movement and placement matters.
