let it be no detraction from his merits to say he is plainspoken.
Examples of detraction
detraction
After nineteen years we seem same, but are coupled and doubled opposite detraction.
From the thestate.com
Adding anybody's name is not an improvement but rather a serious detraction.
From the sfgate.com
The major detraction from the overall design is the use of a wired USB mouse and keyboard.
From the techcrunch.com
A detraction, however, is that he sounds mincing while reading the female parts of the novel.
From the jsonline.com
We made it a differentiation point rather than a detraction point.
From the nytimes.com
Detraction has proved a Golconda to Mr. Richard Harding Davis.
From the theatlantic.com
It documents a growing movement the corporate media refuses to cover without bias and detraction.
From the infowars.com
Not wanting to derail the thread, but I just wanted to add to the Gok Wan detraction if I may.
From the guardian.co.uk
Its main detraction is the thirsty 4.0-litre straight-six engine.
From the nzherald.co.nz
More examples
A petty disparagement
The act of discrediting or detracting from someone's reputation (especially by slander); "let it be no detraction from his merits to say he is plainspoken"
(detract) take away: take away a part from; diminish; "His bad manners detract from his good character"
(detractive) causing to decrease in importance or value; "detractive influences on the volume of investment"
(detractor) one who disparages or belittles the worth of something
Detraction is defined, primarily in Roman Catholic theology, as the sin of revealing previously unknown faults or sins of another person to a third person. This differs from the sin of calumny, which is lying about faults or sins that a person doesn't really have. ...
(detract) To take away; to withdraw or remove; To take credit or reputation from; to defame or decry
Disclosure of another's faults and sins, without an objectively valid reason, to persons who did not know about them, thus causing unjust injury to that person's reputation.