How? Because they added crafting and little XP bars? It doesn't feel more RPG than the other games. Just more of the same but with the typical additions.
By having an armor and weapon system expanded upon from previous games and by having a wider array of both powers and actual skill trees in deciding which path you want each individual power to take. Not sure what "XP bars" you're referring to other than the uh- main XP for the character.