I know that I'm late to the party, but I thought I might share a bit of my experience with v8.
So, first noteworthy thing I picked up on was the first Elder Drake battle. Both easy and hard version have the same bug where if you die... the screen goes black, but the game acts like you're back outside of Via infinito. You get the Rosalina sound to confirm she popped in, then after pressing A enough times, the sound to confirm she popped out. You can even jump around aimlessly, hoping to end the black screen.
But hey, at least you now know to either die to a Master Tonberry or beat the first Elder Drake to a pulp.
Second bug I might mention is the Penance fight. Again, both versions have the same bug, but this time when you die the FF music keeps playing, except in an ominous low tone. When you win, you get the FF victory theme, only like the ominous low music it keeps playing.
And hey, the ominous after-battle music felt like a nice touch. 7/10 would listen again.
And thirdly, Yiazmat. Can't remember if easy did this too, but in hard mode I sort of rushed through the fight with fast-forward and, after wave cannon (pretty sure I fast-forwarded this part), next thing I know I'm seeing "DOW" and a damage number under the far right character. And at this point, nothing happens. I fast-forward a bunch... still nothing. So at that point, I just say 'I softlocked it' and just restart the save state from before the fight.
Remember, kids... don't rush.
I mean, sure there was Valentina in easy mode, but I repatched it in the hopes of fixing that problem. Plus, I've seen people mention that bug before. No biggie.
That's pretty much it for now. I started over on hard mode, so I'll let you guys know what I find (I won't be on too often, but I'll try to listen).
EDIT: I just now remembered this tidbit. So, you can farm galaxy coins on Booster Hill, but something weird happens... Every time you get hit by a barrel, it sends you further and further towards the bottom right of the screen. Cue glitches, enter the snifits for some reason that's random to me.
So if you need to level up, find a good grinding spot.