Yeah I think general summaries are ok as long as they are actual summaries of multiple authors, aren't just mere repetitions of the author's statement and don't elongate the paragraph more unnecessarily. Also I'll like to point out these mistakes in your comment:
"2) per Eliade, approximative understanding, partly of apparently non-Arabian rites, so not much;"
Eildae never says it was non-Arabian. She's talking about Monophysite rites and Monophysite was the largest branch of Christianity in Arabia.

 "3) per Watt, details that may be surmised by close analysis Muhammad's life;"
He also argues that these verses might be attacking Christian heresies rather than orthodox beliefs. 

Also in the final I'll like to say again the subject of the article isn't about Quran and it's historicity and interpretations. So adding more and more unnecessary arguments and interpretations makes the paragraph stray too far from the topic and unnecessarily elongates the paragraph with needless irrelevant text.