On the first one, you may be right. I took the header for that section of the interview (『FFVII』と『FFX』はつながっていた!?
as paraphrasing the interviewer's reaction during the interview itself (『VII』の続編ですか!!
, but maybe it wasn't meant to be read as such.
I kind of had to guess at the subject in that one thanks to Nihongo shenanigans being what they are.
With that second bit, that's what I was going for with the "Is it saying too much?" line (e.g. "Is less more?"), but maybe I didn't choose clear enough wording. That's why I had thought that line is hilarious, though. XD
"Is it going too far? Well, best not to worry about it -- let's just make X-2, connect it all to VII and then write a shitty erotica fanfic."
I think you're definitely right about that last one, though, and I'm going to adjust that line a little bit. It does seem to be that he's saying "Upon coming back to it and thinking about it a second time in the course of adding this epilogue, one realizes just how perfect the original was, etc." It's still part of that same thought process (how difficult it was to add to X), but I misunderstood the second half of the sentence.
Thanks!