Huh? We aren't talking about an 'Alpha Tech Demo' or something like the recent Age of Decadence combat demo - this is a portion of an already commercially released game by an established company, and as such should be reasonably held to be an example of the quality and content customers could expect in the full product.
A demo is marketing, pure and simple - and is even more important in the case of the console release. As such, a prospective customer has a reasonable expectation that the functions provided will work. My understanding is that the game has autosave points and also quicksave functions. I am not sure how either play out in the demo, but given that they both exist, are documented, and neither pops up a dialog stating 'saving is disabled in the demo, but rest assured you can save anywhere you want in the full game' - I don't think it is unreasonable for a new customer without the benefit of years of RPG experience would try this, see that saving doesn't work as advertised (i.e. is *broken*) and skip the game - because it fundamentally is reasonable to assume that if a company can't get a simple demo right, why should we expect anything BUT a buggy mess from the full game?
As for the hanging cutscene, my 'months' comes from German friends who have said that bug has been around since the original release of the game, but it is with the English release that it has become epidemic (with huge amounts of 'me too' posts on the forum). I don't know anything about the issue or potential resolution, but apparently it won't be fixed for the North American release, which could end up with the game getting a reputation as a buggy mess which will torpedo sales even more ...