Arbitrary stats that offer little to the experience hardly are the "final RPG features" in the game. If you are so opposed to the "open world shooter" that Fallout 4 clearly is, why don't you go play Wasteland 2 or any "RPG" made before 1997?
"Dumb" answers are silly and are not practical for a game so reliant on dialogue and a voiced protagonist. As far as it being "the most iconic Fallout feature," that's entirely subjective and clearly BGS disagrees. I guess you've never played Skyrim, Dragon Age, The Witcher, or most modern RPGs or MMORPGs that have been released in the last 10 years. "Intelligence" as a stat is not as widespread among RPGs as you might think.
There is nothing remotely realistic about any of the stats, especially intelligence. You merely bolster my argument of how pointless these stats are with the level cap being removed as characters can be "perfect" now. It's pointless fluff that isn't actually adding anything of value to the experience.
You don't seem to get it. The way intelligence works in Fallout basically is deduced to being "smart" or "stupid." Even a more realistic level, there is a certain threshold where one is considered smart or stupid, regardless of IQ or any other imperfect tool to measure intelligence.
Charisma is something that is practiced. It is easier for some to use than others, but ultimately it's a skill that requires effort in order to hone and refine. It's just like public speaking. As far as intelligence in the mind, you are either born with book smarts and common sense or you aren't. They aren't something that can be learned as it apparent considering most people are stupid.
Wrong. BGS makes the system that works the best for their games. Their "failures" in Fallout 3 was not a shortcoming of their own, but a shortcoming over the very system they took from Black Isle. It needs to be revamped and overhauled to better fit a next gen open world RPG.