The latter half didn't stop anyone. They could've pulled in some new "oh this is another voidgate that's very big" like how they did it in the Source and be fine.
A voidgate WILL NOT go to the First. There is currently NO WAY from the Source to the First..well there IS, however the last time we tried it, Beq Lugg practically skinned us alive for even TRYING it. The method is dangerous and potentially fatal.
When we brought Unakalhai to the First, Beq Lugg was LIVID, outraged we had taken such an insanely stupid risk..it was luck alone that the Scions made it back intact, bringing a soul FROM the source the same way and not having him involved????..I wasnt surprised at his reaction...along the lines of WHAT WERE YOU THINKING??? Are you INSANE?
"You did WHAT????" were his exact words.
Plus, Zero's development would be a lot better if she learned that there were survivors from the 13th.
She may later but has been said, she CANNOT go to see them. FEO UL cant do it either...pixie she may be, but she cannot leave.
Zero alone being the core of the story is not enough. It's not meaty and it's depressingly bare bones. If we compare Zeros' arc to Julius' arc, a literal foot soldier of the Garlean Empire, Julius was way better introduced, way better explored, and way better executed until the end. Zero has an ok introduction but that immediately fell flat, and now I'm hoping that they'll actually finish strong.
We have a long way to go yet. Patience.
I actually found Rubicante sympathetic, actually, even an immortal can one day wish to die. I liked the character and his motivation.