The only thing from either of those games that I would like to see again is how the subweapons were handled in Lament of Innocence.
I really liked how say, the Axe wasn't just "The Axe" oh hey, throw it and you're done, there, that was "The Axe".
But by equipping different orbs you got a variety of different Axe attacks. That's something I'd like to see again, varied attacks with sub weapons outside of normal, and item crash.