I fully agree. The BG 1 NPC Project actually was the best game experience I ever had, along with the Longer Road mod from BG II TOB. Although on the latter, tastes might differ..
It isn't. Must I say much more? I don't consider the half-empty maps as something bad. I mean, that's just how it usually is in the wilderness.
And of course you're entitled to your opinion. But many people regard explorability as one of the good things in BG I, even if they don't like the game much as a whole.
I figure that if one has first played IWD and BG II combatwise, BG I might appear rather underwhelming. But overall, it's not a bad game. It has not all elements that a modern game should have, so naturally, today's players find it lacking. But the things it does, in my opinion, it does very well.
BG1 was just the most believeable of the series.
The "half empty maps" gave the players a feeling of real exploration, whenever you found something - or somethign found you - it was a big deal and you got really excited.
You had to be carefull out in the wilds, otherwise you might just find an angry wolve who rips 1 or 2 partymembers into pieces.
The cities were crowded and there was so much to do - the wilds where what they were supposed to be: wide and lonely, but still very interesting because you KNEW there is something in this area thats going to be exciting.
You also were very poor from the beginning which fit perfectly in the amazing story.
"Father" dead, left alone in the wilderniss, no clue whats going on or what to do - and it felt right.