Quoted from Rarehero:
Yeah, 30-something modes....there's nothing to do lol.
Yeah, there's a ton of modes but there needs to be more rewarding reasons for completing them.
Right now there are 31 book modes in the game but only 3 need to be completed to unlock an Arkenstone mode. What about the other 28 book modes? The book modes are awesome, a lot of work went into them, but there needs to be more incentive to play through them. A reward for beating the sets of man, elf and dwarf modes and / or for beating say 5, 10, 15, 20 etc modes would be great to see. The lack of something along those lines is biggest issue I have with the game today.
Also, it would be nice if Beast Frenzy and Feast Frenzy are expanded upon to make them beatable with an option to turn off stacking with Smaug MB so that Smaug MB can be enjoyed on its own.
Oh, the qualifications for reaching an Arkenstone mode are all the same so you have to do the same 4 tasks 3 times to unlock the 3 wizard modes which makes the game feel like a bit of a grind. It would be great to see the qualifications for the 2nd and 3rd Arkenstone modes altered slightly to mix things up.
Finally, a super wizard mode for beating everything would give the game its own "Somewhere Over the Rainbow" equivalent goal.