Some clergy and laity seem to have difficulty distinguishing the difference between 'certainty' and 'faith' ...and/or between 'uniformity' and 'unity'.   The pope's exhortation reflects what occurred at the two synods,  and that the prelates often had to agree to disagree...  unity without uniformity,  based in faith and not certainty... if one wades through and reads all of the paperwork cranked out.   Clergy and laity with an intolerance for  ambiguity of any sort are nearly apoplectic trying to nail the synod results down into hard and fast rules.    That cannot be legitimately done without nullifying the meetings and results themselves.  It is what it is.

My sense of it is that a need for absolute certainty etched in concrete rules stems from a fear of otherwise losing faith... faith that is a gift from God and not the result of a mandate for children. Pope Francis is treating Catholics like adults.