I think the point here is that if someone went to play BG1 for the first time, the game would come across as being a serious attempt at a legitimate RPG rather then a RPG parady. Yes, the devs built in lots of little cheats and gimics and allow plenty of bugs to be exploited, but the first time you played it, without foreknowledge of these exploits, you get the impression that the devs were taking the the story seriously. This is what was intended. Most of the exploits in BG1 aren't in your face obvious, they are there to be discovered and abused later when you've finished the game and are goofing around trying to break things.

I completely agree with GM4Him that the mechanics should be realistic instead of road runner. Basic mechanics are what will keep this game alive for more then 6 months after release. If people can't take the game seriously, they won't want to play it more then once. The two most successful RPGs I can name without even thinking about are World of Warcraft and Skyrim. Both of these games have odd little quirks in them, but the developers took the mechanics serious as a heart attack. If Larian wants the game to be more than another DoS2, then they should look at what those two games did right. DoS2 is a decent enough game that most people finish it, remember it fondly, or at least not negatively, and move on. Skyrim is a game that people have spent years playing, same with WoW.