You're right, that's a serious omission.
Michael Cuscuna wasn't quoted in the article, so he probably wasn't interviewed. If he had been, I'm sure that Charlie Lourie would have been mentioned as co-founder of Mosaic.
Just tonight I stumbled upon this fellow's interview of Cuscuna for JAZZ that was posted two days ago. His name is Gerald C Watson II and writes this on his Facebook page:
Though there are typos that makes for difficult comprehension in parts, I found the interview quite interesting. Charlie Lourie is not left out.