From what I have seen on multiple Shenmue fan domains (YouTube, Twitter, Facebook, Dojo, Forever, 500K etc), I believe a majority of the fandom are pleased. For instance, compare the YouTube Likes (3.4K) to Dislikes (130) on Deep Silver's 'The Prophecy' trailer.
I expect YS Net are aware that as with any hugely anticipated sequel, it's not going to satisfy everyone who have different expectations of what they want from a Shenmue 3 experience, and that anything they show will inevitably attract an extremely vocal minority of pissed off fans and journalists who salivate at the thought of trashing a niche, unusual series for clicks. I hope for the sake of remaining true to Suzuki's vision for Shenmue 3 that YS Net do not feel discouraged from this.