I genuinely don't think PSABR roster is that bad, like sure I wish they got more third party support like Crash, Lara Croft, Cloud and stuff, but in term of first party characters, I think they did a good job of representing the Sony franchise of the ps3 era. People used to really not like Big Daddy and Isaac Clarke, and sure they're not huge Sony icon in the same way that Crash or Lara Croft was, but Bioshock and Dead space were really huge back in the ps3/360 generation. It's not a perfect roster by any mean, but I think it's a fun one.
I think what really killed the game too was the balancing. The guys who did PSABR balancing must have loved hack n slash because goddamn Kratos and Raiden just destroyed everything, and other characters like Spike and Sir Daniel were pretty much unplayable. The game was barely even more balanced than Brawl, which is saying a lot. Even taking the weird super system aside, the game had no chance to have any serious competitive scene with that balancing.