Starting the players anywhere doesnt mean much - since they would have already bought the game.
But if they make some kind of free demo that is concentrated specifically on these more interesting features - or, start journalists in such a place that is full of this better more diverse content - that would work.
I already suggested it on the blog, btw.
This is actually a very good idea. Seriously, I'm almost ashamed that I didn't think of it.
The way to do it is definitely to avoid the typical lazy-demo trap of just using the tutorial and the first level/area of the game, with perhaps a later part thrown in. Provided there's adequate explanation at the start to avoid confusing demo-players, it wouldn't even need to be a segment of the base game itself (in which it's hard to showcase everything within the adequate timeframe), but a special demo module custom-built to showcase what Larian deems the key draws of the game in a more concentrated fashion, within the timeframe of a single short adventure. If you really really worry they still aren't getting it, you can even explicitly point out what's being showcased with some form of in-demo commentary (though it'd be nice to have the option to disable the HEY DUMBASS THIS IS WHAT WE ARE TRYING TO SHOW YOU popups or whatever if they're in the demo).
I can think of a number of games that have done this or something similar, though they grew fewer and fewer as time went on. I think it was one of the Jedi Knight games that had a pretty good example: A fairly short level, not found in the base game, that in its short length showcased gunplay, puzzles, saber combat, etc., better than any individual level taken from the game would have. Instead of providing a cut-off chunk of the game itself, having said custom level as the demo allowed the player to get a sense of what the game experience was about as a whole, in a quick condensed format.
With their toolset, it should be possible for Larian to create a short module tailored to this purpose. It would take a bit of thought to figure out how best to address the key aspects they want to cover in such a short package, and would no doubt take some extra time, but if Larian is genuinely worried about people not 'getting' what the game is about, this is probably the best way to solve the problem. It wouldn't help much with reviews, since those would be based on the main game, but it should at least help with previews and the average curious youtuber/random uninformed guy not quite getting what the game's meant to be.