Just as there's no such thing as a perfect game, there's no such thing as a perfect critic. Mainstream "Professional" game reviewers review games as their job. As such, they tend to rush through them, and play a vast number of them. Aside from any inherent biases for or against a franchise they might already have, it's easy for them to get burned out and not give a game much of a fair shot unless it's something truly special, and that's not even to get into the situations in which they get paid off to give a good review.
Youtubers and the like aren't really much better though. Even when their presentation is professional, they still have their own biases as well, regardless of how fair they try to be. It's simply a consequence of being human.
As such, any criticism towards a game is to be taken with a giant grain of salt. Different people have different standards, tastes, and biases. The only person who can truly decide for you how much you enjoy a game is you yourself. Criticism can't be a reliable metric for how good a game is because such things are inherently subjective. In that sense, there's no such thing as an objectively "good" or "bad" game, regardless of how many people agree otherwise. No matter how many people agree that a game is awful, there can always be that one person who sees through the flaws and manages to find a glimmer of worth and fun. No matter how many people agree that a game is the best thing ever, there can always be that one person who simply just doesn't get it and can't relate at all, finding no enjoyment out of playing it. Such opinions are equally valid, and cannot be "wrong".
In relation to the topic at hand, my point is that regardless of how much more popular any particular game in a series is than another, whether that be among critics or otherwise, anyone is valid in their feeling that certain aspects from less popular games have potential to be put to good use in the future. Even Sonic 06 had some good ideas going on that are worth giving a second chance, such as the mechanic of having certain sections of the levels transition you into playing as a different character. Though, I do think if that were to return, it should be relegated to optional pathways so as to never be forced on the player.