When it rains, it pours:
And yes, Dwip's general point about journal entries should be taken to heart. I understand where you're going with this and have myself tried to impose similar conditions in my earlier mods. It didn't end well. I usually had more questions about stuff than I was hoping for. I got stuck on the same thing with Bruin that Dwip did - I simply didn't recall where he said he was going to wait and gave up searching the city and was on my way to leave when there he was.
I know it seems somewhat harsh, but I gave up the desire to keep notepads filled with clues after the Ultima series. This is part of why I've never managed to finish Ayleid Steps either. Not enough stuff in the journal now for me to even remember what I was doing. Windfall had this problem in spades and I had to guess at random on where to resume that quest when I picked it up several months later because the journals had no info and the structure of the mod made scouring the CS for clues almost impossible. I stumbled over my objective there entirely at random. I very nearly chucked Windfall out of my load order before completing it because of this. I don't want RST to end up being the next victim of this problem - and I'll be totally frank - it's already getting that way because I've had to stop, exit, check the wiki, and when that doesn't help check the CS instead in order to know what I missed.
I am with you on the desire to leave out the Bethesda GPS System though. I don't much care for it except in cases where you should absolutely know where the target is anyway.