Loedbell`s Jason as Robin just acnowledged how good of a student he was. Fast and high level learner. He did the same with him under Ducra and the Al Caste. Yes, he`s mention Jason as saying his younger days were met with rage before but I didn`t take that as intentionally setting him off as the screw up but merely to compare his later growth. It was his Robin gig that in the end set that difference. One needs to remind however that in previous volumes, Loedbell barely touched upon Jason`s Robin days, save a memory or a mention here and there and none of it was in any way shown in a negative light. I think there`s balance in that.
The superior figther thing is IMO a bonus point. It`s nice if it`s adressed but things like taking down Shiva and matching Cass made him look much better than Dick. You had Tim fanboying over Jason`s abilities in the DOTF tie in. Despite the rushed ending of R:W, you had Damian and everyone else fawn at how smooth both Jason and Tim staged the whole fight to get all of them free. Despite being more protected than everyone else and being the youngest included, Damian is the one who gets routinaly (in Bat books at least) called the least capable figther. Bruce himself has told him so when directly comparing his level with the other former Robins. Jason, Tim and Dick were all kind of embarassed when Damian issued his challenges and any points he got on Tim and Jay were stolen by pushing especific emotional buttons so he could try to prove they weren`t much different than him. Then he ran off. Smart, but that`s about it.
But I get it, you want something more palpable. Something more eye catching, more definite, like in Last Crusade where Jason in training was directly compared (and well!) with the man himself, let alone the former protege.