One person has a couple negative things to say and this is supposed to warrant reactions like "yikes" and "not very reassuring"?. This is insane.
When posting here, you need to take the personalities of the posters in account as well.
Having said that, this is literally our first encounter with someone who has actually played the second half. The "negative" reactions are referring to that, seeing as it's already quite established that the first parts of the game are looking very promising.
It's not unrealistic that the later parts don't hold up as well as the first parts, so it's not necessarily "just the opinion of one person".