It seems like there are two different eras on the R. Franz saga, one before coming to Bethel; during that portion he was a Corporate man and behaved like any CO, DO, BO and any other JW in a position of authority.
At Bethel it appears like he tried to correct what he saw as needing mending, the most relaxing period of the WT was during his stay at the top during the 70s.
After his departure, he kept changing for the better; friends who visited him and his wife over at GA spoke very highly of their warmth and caring attitude. Whoever dealt with him during the later stages of his life, left with a good impression.