Yes I agree with you, very often I had to check the wiki in order to finish a quest because I didn't remember the details that the quest giver told me. I know that it is still possible with the help of the log to re-read the dialogue, but after one or two combat(s) or if you load a save you can't do that anymore. So yes it would be great to have a quest notebook more detailed, especially for the quest giver who don't repeat the information about the quest, example (if I remember correctly) the guy in Junkyard who is looking for his knife.
And of course the map seems to be essential for a lot of people, I saw a couple of threads on the subject but there wasn't real answer. Plus I read that the current version is the last before the release, so my question is will there be maps in the final version ? Even if we have to buy them, craft them or draw them automatically when we explore the different zones, it would be very useful to have a map.
Edit : If the developers want something more roleplay for quest notebook and the dialogue issue, maybe we could have some kind of voice recorder with the possibility to record conversations related to quests or something like that.