I've been playing for a time now I am lvl 15 and I have some things to recommend
Spells - I think it would be a good idea to have 2 or 3 sheets of spells so you can save more than 1 spell configuration ( configuration 1 for pvp..configuration 2 for pve, etc) maybe sell more of them with those blue crystals?
Spells - I think it would be a good idea to have a different AURA around skills that are specific for each class.. because I currently do not know which spells are unique for my class ( now I know because I looked into another forum thread )
Bestiary - I think that having a book with information of monsters after you defeat them would be a good idea also..encourages you to fight different kinds of monsters ( maybe you can have rewards by completing it )
Runes - maybe you can have "Monoliths" ( I do not know if the spelling is like that ) fixed on the map to pray on? to receive buffs to help you on exp gain or skill points ..for example "+15% skill points gain for Dark Arts" or " +10% Character xp gain"
Character/Monsters Animation - I know that animating characters and monsters could be difficult or lower the performance on the phones maybe but currently I feel like all monsters are rock solid.. they do not move at all.. maybe dividing the sprite on the limbs and giving them a little bit of movement? just a little bit ..so they are not rigid. ( this could be a on/ff option on the phone configuration)
Corrupted Monsters - Fighting the same monster over and over to lvl up can be a little bit boring..maybe you could add "Corrupted" Monsters that have a % chance to spawn instead of a regular one with 20% increased stats .. and the same % increased exp reward? Maybe with different colors or aura around them
That is all for now :D keep up the great work you are doing, the game is really fun to play ( I will be adding more ideas if any )