Divide and Conquer Approach to SWOT
I recommend that the SWOT analysis be disaggregated into its 4 parts and distributed to different people for undivided focus on the one aspect. Each element is to be swapped around for discussion and counterpoint appraisal before being aggregated again as a completed analysis.
Why this approach of divide and conquer SWOT?
Concentrating on one aspect removes 'conflict of interest' and conviction in analysis between the opposing elements. Each participant can be forceful, undivided and unbiased, consciously and unconsciously to deliver his/her arena of arguments and fully don (~put on, dress in) the devilís advocate gown.