Well, seems like I lost the results for the current poll, through no fault of my own. I just came back to find out only one solitary vote is left for the Hidden Grottoes. Great. I'll keep the poll up in the event that the votes miraculously come back, but I might be hoping for too much here. All I really remember is the nail-biting affair between the Fanservice Tournament and Challenge Mode (as I really don't think anyone really cares about Easy mode, though to be fair this probably is the hardest main series game thus far even without Challenge Mode), and how poorly the Funfest Missions and Join Avenue did. I'm not sure if it's because most people have yet to realize their true potential, but nonetheless, it's good to remember that Funfest Missions are the best way to grind for all kinds of stuff, especially shards (though before the post-game which shards you find depend on your version, sadly), while Join Avenue gives you discounts that quickly stack up when you level it up. Just saying.
Edit: Another vote came in, yet the vote total still says "1", and both options with a vote have 100%. This thing is borked beyond repair.