When switching between difficulties to maximize experience for quests/battles, sometimes the expected XP bonus is not given.
Example: Easthaven goblins give 30 XP instead of 2000+ on HoF setting and/or Story Mode (not sure what they're supposed to give on Story Mode, but it's more than 30)
I'm not entirely sure if this is a result of switching difficulties or if this is simply a bug with the difficulties themselves, as I have sometimes started on Story Mode and gotten less XP than expected, while other times I've started on HoF mode and have gained less XP than expected. This could be two separate bugs, but I haven't done enough tests to be sure. I've noticed these experience discrepancies with six different games, some with a full party, others with only one character.
Also of note, (and I don't mean to be putting a second bug in the same report, but I may be doing it unintentionally since I'm not sure if it's part of the first bug or not) the goblins seem to sometimes take far more hits than they normally do in Story Mode. I can't tell if the game isn't fully switching difficulties or what, but I have the invulnerable effect yet the enemies are as hardy as they are in HoF mode.
I can't imagine this experience problem being terribly detrimental to someone playing on Story Mode, but this could be crippling to a player in HoF mode.
This is easily testable for yourselves simply by creating a new game and fighting the goblins on various different game settings. You can save on the bridge and you should be able to see the strangeness for yourselves.
Just for information's sake, my Ipad is either 3rd or 4th gen, and is currently running 8.1.1. I also have yet to progress past Easthaven in any of my files, so I don't know if this problem persists in future areas, or if it's related to the goblins. I haven't paid any attention to the experience the wolf gives, though I have noticed Story Mode gives 2400 XP (100% more than Core) per quest in this area, while HoF mode gives 1800. (50% more than Core) This may be intended, but I thought I'd mention it so you know as much as possible.
Anyway, this problem isn't causing me any problems (yet), but I thought I'd bring it up.
Edit: After some more playtime, it seems that the big issue here is HoF not working. It gives 100% bonus XP on kills, but not the massive bonus it should. Sometimes Story Mode gives HoF XP for kills, but most of the time it works as it should.