I was not previously familiar with Chandelier, but it appears to be more of a data organizing and storage system than an actual unique evaluative method. It might be a better articulated way of doing what good evaluators do anyway, which is to combine developmental and family history, setting/environmental factors, educational history, social/emotional/behavioral factors, instructional fit, etc. with direct and indirect psychometric data to formulate a learner's profile, in order to generate actionable recommendations.
The plus side of Dr. Tebbs philosophy appears to be that he is strengths-based.
Link to an article from Roeper Review by Dr. Tebbs, on Chandelier:
https://eric.ed.gov/?id=EJ1031897Link to a ppt presentation by Dr. Tebbs, on Chandelier:
https://www.world-gifted.org/WCGTC17-Presentations/2-4-2.pdf