Elden Ring is not "polished"? What are you talking about?It happened already with Elden Ring, BotW and TotK (although I wouldn't really call any of them "polished"), so I don't see why Stellar Blade should be blamed for it. Hell, even Starfield has an higher score, and that one is neither polished nor reaches mediocrity.
I haven't played it yet, and I'm 100% sure I will like Rebirth (which I platinumed) more, but comparing the first entry in console games of an indie dev to such an epic franchise like FF seems a little bit unfair.