Just finished WD2..

I have just finished WD2 straight on the heels after finishing WD1. My sentiments are the same as most people so I won't go into my thoughts.

But my question is.. I have heard and read all the things about Legions. I'm not sure I want to play it considering. However, is there a way I can play just the Aiden Pearce DLC without the full game - and or would people recommend legions if can play as Aiden which I read you can?

(Also if any WD2 DLC's are worth it? Have a lot of fun hacking online but I never get hacked myself!)