Amina Inloes, Amina Inloes is originally from the US and has a PhD in Islamic Studies from the University of Exeter on Shi'a hadith. She is the program leader for the MA Islamic Studies program at the... Answered 11 months ago

If it is necessary for your work, it is not backbiting. Writing for publication is a public activity, and anything written and presented publicly can be discussed in an honest and sincere way. 

It is better to say that it is poor quality in the beginning than to publish poor quality material and be an embarrassment to Islam and Muslims.

However it is good to be tactful and choose nice ways to phrase your criticisms since writing is a very sensitive subject. Perhaps some tips on how it could be improved might also be useful.