MoonSong
Rules-lawyering drama queen but not a munchkin
I'm not blaming them on focusing on Fighter mechanics. It is a big issue.
I blame the fans more for giving wonky feedback during the play test. Down voting stuff with poor explanations why and thus forcing the design team to guess over and over with little to go off of due to conflicting feedback. This sucked up so much focus that flavor was forgotten.
Maybe you don't remember, but I do. And what I remember is that all of these flavorful subclasses were problematic, they stepped too much on the backgrounds territory -basically all of them ended up becoming backgrounds or part of backgrounds-, and were very single minded, not very flexible and didn't cover enough ground. I remember complaints like "I shouldn't need to be a fighter to be a gladiator", "I shouldn't need to be a gladiator -with all its trappings- to use exotic weapons", "I should be able to use any kind of weapon as a gladiator, not just this pre-approved list", "This gladiator doesn't feel like a gladiator.", "This gladiator feel too monolithic."
Really, I can only wish the sorcerer had been on the open playtest, so we had more generic more inclusive subclasses for it too.