What "other games" did is completely irrelevant. This game's systems are programmed in a way that ties choices and consequences by characters to the specific campaign. Decisions you make have consequences in the world. For instance, tell a Tiefling she should get revenge, and her body appears elsewhere in the world later, you can walk to it without a single loading screen in-between.
Larian attempts to program their games around systems which always work, instead of needing to code custom exceptions all over the place which work in one spot and one spot only. Don't make assumptions about the knowledge of other people, just because you don't like the answer you're getting.
While this discussion is pretty fruitless, again, what you are describing is not unique to Larian and this game, it is obvious you *did not* play other games who do that, and have the option to export and import chars, like the original BG games. consequences and all the examples you gave is something rather common and not unique to Larian at all, BG had it, Dragon age had it, many Bioware games had it.
And still, some of these games found a good way to include importing and exporting chars. I do not understand, as you are not a dev or a representative of Larian, where your absolute confidence and rejections comes from. And concerning the reasons and other games (that have exactly the same philosophy and system, and until now have handled the issue of deep consequences muchhh better then say DOS 2) you are defnintly wrong.
actually, come to think of it, until now Larian games were rather much weaker then aother games in regards to consequences, relationship between chars and such.
I hope that either Larian will see that many people want it and add it, or like Lonesky said, some moder will find the way.
and exactly what warlock said, took the words out of my mouth.