At the end of RoW, Taravangian ascends to Odium and inherits quite a few memories and information from Rayse. Well, I don't know if it's Brandon's favoritism towards TOdium, but I don't understand why Taravangian inherits so much information, but Kelsier, Vin and Sazed don't inherit any information from each other's pre-Preservation vessel (Kelsier from Leras, Vin from Kelsier and Sazed from Vin). And the same case of Sazed with Ati.
Maybe Kelsier doesn't inherit any information from Leras because the latter was slowly dying, but Vin should have inherited Kelsier's short-time memories as Preservation as well as Taravangian from Odium, and Sazed should have inherited Vin's memories and Ati when ascending, but it was not like that and it gives me a feeling of unevenness between the shards, despite the fact that Odium is somewhat hurt by his battles in the Cosmere, but Preservation and Ruin are intact despite the deaths of their original vessels.