I have three complaints:
1) Loot later in the game is really bad. I can frequenlty buy or make items better than I find; and rather hard fights usually result in pitiful low level loot (i.e, boreas level 5 loot; I find the key to source king chest at level 20 and it has level 8 loot; so on). Personally I think you should be able to find or obtain loot that is better than what you can craft (though enhancing found loot via crafting is a plus) or buy.
2) I cannot get some quest to close and it is not clear at all.
Two examples:
I talked the imp to return to frederick and then the next step of the quest is to make a courage potion but since i already talked him into returning and he left the cave I have no clue where he is to give him the potion.
I managed to get the orc and humans to fight and I think all the orcs are dead but the quest fails to close.
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I have 3 more open quets like the 3 above
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3) I have arrived at the temple door and have 12 inert stones (btw only one portal in end of time has opened which seems odd for 12 stones) and the door won't open. THere is no real indication of how many stones I need or where I might find them and the world is fairly big for this sort of sorry you can't finish the game because you might have missed some corner of the map or maybe a secret exit somewhere and there are no clues at all where I should begin searching for this missing stone(s) (no clue how many are missing either).