So, there's some stupid explanations for things here, but here's my reasoning...

Sega ain't ever gonna do anything with the Sol Emeralds again. And even if they do, well, whatever. I mean, I blew up Space Colony ARK, I think I'm done having my story take place in their canon.
...(also I needed an excuse why Burning Blaze couldn't use her OP power to stack the odds in our heros' favor in the finale)

Also Capricorn remembered her name before she died again...and it's the same name Fera used when she had amnesia? What does this mean?! Does it mean anything!? Are she and Fera related somehow??? We....will likely never find out. This never comes up again.
Not every mystery has to be solved, you know.