I want to invite you to consider that You are conflating Alignment and reputation.
That's the way that alignment was implemented in BG so that's understandable.
Well, iirc if you started out with an evil alignment in the original games then you got a penalty to your reputation, or a bonus if you started with a good alignment, but the reputation score was nevertheless managed separately from alignment from that point on, being impacted by quest completion, murderous actions or bribes at temples. A single number was still a very broad brush way of handling reputation, and if Larian want to do something similar but a bit more sophisticated then it feels as though they have the raw material in the form of their attitude mechanic. Not a whole lot is done with that yet, but it could be.
But while I think there might be a way to better use attitude to reflect opinions of our party, what I think really makes it feel as though our choices have consequences is NPCs having specific content related to actions of our party that they could be expected to know and care about, unmediated by things like alignment or reputation scores.
