NWN was designed from the ground-up to be a multiplayer experience. So, I think it's natural to take the whole feature-set into consideration.
But if you don't value multiplayer and what they did with NWN, then that's just where we differ.
Your line of reasoning begins with a misinterpretion.
Your comment remind me about reviews that reduce the score for a singleplayer game with the comment "do not include multiplayer".
DA:O do not have a multiplayer setting, nor a module maker, so I find it natural that I judge what the two have in common; the singleplayer campaign.
Am I to judge the multiplayer setting, or the modulemaking utility, my conclusion is also very different. I had a blast playing the OC in NWN with my friends. One of the best multiplayer experiences we had. I also led a mod community for a couple of years.
I think the only "right" thing to remember, is how people are different.
Well, no.
A key function in our capacity of social interaction is our ability to not only assume that people are different, you must also give the effort to attempt to grasp someone else's point of view.
This process is threefold;
Step one is an attempt to
try to understand someone else's point of view. The more experience you have with people, the more "kinds" of people you will be able to interpret correctly.
Step two is to suspend your judgement in order to evaluate the situation, chances are great that communication might go wrong, especially on the internet. Misinterpreting someone else is a very common and unfortunate reason for hostility between people. Restating someone elses position falsely is called a hayman and is even worse.
Step three is to try to find a common ground. The goal with this challenge is to find things you have in common in order to establish a mutual understanding, friendship, companionship, or at the worst situation, attempt to strike an agreement that you simply have different tastes.
Failure in any of these steps might lead to conflict which might lead to harm, hostility or other bad situations.