Anyone knows if changing difficulty is possible dynamically. For example if i feel, for example, that the game is too easy/hard on normal can i change it to hard/easy and will it take effect without the need to start the game from the beginning.
Yes. Check the tooltip on the vitality in your inventory... (there is a +60/+15/-25% HP modifier for easy/normal/hard). A change of difficulty will be immediately reflected in your hit points.