I have finished 
and I love everything of it but grinding after campaign. Its an awful idea to make people spend couple of hours for just some materials. Especially that we are grinding on the same areas we have already visited at least 4 times. When there is a curse (I dont know the right english word for this and i have unistalled already so I cant check) after campaign on some area there should be a boss or something with loot we need (materials to upgrade weapon to maximum). Exploring whole area another time is boring and frustrating. So my advice is that you should consider grinding and the end of the game. Apart from that i love every single moment of this masterpiece.
Unlucky I noticed near the end that I can have electric enchant in weapon and I can deal electic dmg all the time. This bonus should be a bit easier to achieve because I have used almost 80 materials to have electric enchant (and dropping them is tiring a bit). Im waiting for next big updates and wish you all best.