Nothing is wrong with it. It's just that there is no such thing as completely perfect. It is as perfect as it can get.
What's missing or wrong from it?
It has been a struggle to find anything to complain about with the complete series Blu-Ray set for The Dick Van Dyke Show.
Jcroy, I do think it's always an issue that the studios don't know as much as the fans do.
Unless someone directly involved with the original show is brought on to consult, I imagine a lot of this stuff is just being released blindly.