While waiting forever for this delayed game this year, I bought, played and just finished Gungnir. I played the begining of RO on Vita as my first Vita title. I wasn't terribly impressed from the get-go. The menu itemization takes a bit of getting used to since you don't always know what is from what after you complete a quest. Timed quests is interesting as it rushes you to not dilly dally and get straight to action.
The frustrating thing I had experienced was going through the quest to only be killed by the boss after I ran out of potions. Perhaps I need to take up the multiplayer mantle to get through some of the tougher bosses.
As far as the story goes, I felt it was missing, but again, I probably just need to progress some more. I'll give this another try before maybe moving onto the other Ragnarok title; Ragnarok Tactics.
If anyone wants to add me to their RO party/multiplayer as well, my PSN handle is cbrd1025.