What does it mean when the reviewer says "the results are rather straightforward"? We submitted a manuscript to a reputed journal and we are asked for a revision. One of the reviewer commented

The results are rather straight forward and would be useful to the community of specialists working on optical properties of anisotropic crystals

What does it mean when the reviewer says &quot;the results are rather straightforward&quot;?
Offhand, it could mean two things:

The results are to be expected, i.e. not surprising. Normally not a good comment to receive since it implies the paper is not interesting.
The results are gotten in straightforward fashion. For example, if you were asked to take the derivative of an elementary function, there's a well-known series of rules that will lead to the derivative. If the function is complicated enough then taking the derivative will also be complicated - but it is straightforward. Apply the rules correctly and you will get there.

The rest of the sentence leads me to suspect the second interpretation is correct.
If the second interpretation is indeed correct, it wouldn't be something to worry about, and your attention is better focused on what the rest of the review says.