"minor suggestions" is correct and usable in written English.
You can use it to refer to small alterations or recommendations that could be made to improve a situation. For example: "We have made minor suggestions to the design, such as changing the font size and color."
However I have some minor suggestions or comments.
The association said an employee contributed "minor suggestions" to the letter from Mr. Rush.
The catch-all disclosure offence for special intelligence operations remained, with some minor suggestions for change.
It largely supported the content of Safe Schools as educationally sound and robust but made minor suggestions for changes.
The e-mails showed that she had made a series of minor suggestions to improve a three-page sociology paper.
A focus group consisting of five students revealed that students appreciated the module's interactive interface and minor suggestions were made for clearer content display.
No major revisions were suggested by the participants, just a minor suggestion as to the specific captions in English was made by a native English speaking participant.
One minor suggestion: The noisy air-conditioner is a necessary evil in the theater, which is slowly undergoing restoration; background noise used to set several of the scenes just served to muddle the sound even more.
One minor suggestion: the West could extend its targeted sanctions, which freeze the assets of, and ban travel by, Mr Mugabe and his cronies, to the business associates who bankroll his regime.
One minor suggestion was made to add supplementary explanation to the "radiation skin reaction" item indicating that this question is intended for cancer patients receiving radiation therapy.
I only make the minor suggestion to consider adding the word "BY4742" before the word "yeast" in the title.
