The Best Change is Intentional Change
I just delivered art on an annual report and a 72-page magazine. This is my 3rd time on both yearly publications. I have another repeating magazine scheduled to go into production February 1. In all these cases, the font style sheets, page footers and numbers, margins, column sizes, and other graphic accouterments remain the same as their earlier editions.
There is usually an angel on my shoulder telling me to make it look different, that the client wants a new look even though nothing was mentioned. The truth is, if there is nothing particularly wrong with the layouts, nothing should be changed. The look and feel repeats.
"Look and feel" is a term for a generalized perception of a given thing. Look and feel are among the elements supporting the brand identity and should remain consistent and continuous across all the channels of your media. Brand tuned look and feel done right bypasses your audience's conscious awareness and speaks to the emotional center.
The goal for every graphic designer is to get the target audience to read the thing designed. A different look and feel every time does nothing to build readership. The designer may be bored by repeating the same look and feel. The client may be bored by repeating the same look and feel. The reader seldom is.