In conversations, all my party members attributes and skills should be taken into consideration. They are standing right next to me, listening in. They will definitely inform me if they recognize a deadly poison.
I take it that you missed the part where each companion has their own unique agenda. Just because they are grouped with you doesn't mean they are going to take care of you.
Shared inventory is king - You usually have a face/front character picking up everything. It doesn't mean that the character does all the heavy lifting.
Shared inventory at least as an option!
Like several other complaints it removes another aspect of D&D world. Encumbrance is another one of those management mechanics that has been in D&D since it's beginning.
Advantage: This has been a major topic elsewhere, but the "to hit" bonus of heights is just silly.
Rule #1 of combat... whoever holds the higher ground has the advantage. Just ask Anakin

Opinions from NPC's: Every NPC has extremely strong opinions about everything, and it's really black and white. They Approve/disapproves all the time, and usually not in a very nuanced way. It's really based on "I'm good/evil". They even butt in on private conversations in camp: Private chat with Wyll: Astarion disapproves!
One of my joys in games like this is the challenge of keeping everyone happy until the end. It adds roleplaying, playing your party members against each other or changing their point of view. That is very difficult if everyone is black or white about everything. If I choose a "sensible" path, both good and evil characters should approve of it, unless they're a chaotic evil murdering machine.
And in a lot of occasions, they really shouldn't have a preference! We're literally trying to find a cure for a tadpole, so everyone should be a little more open minded about the how.
It's not black or white, good or evil. Each are different with their own agendas, perceptions, beliefs that guide their own motives and aligning your decisions with those is what affects whether they approve of your decisions or not.