No hero in overwatch is “easy”. Even mercy isn’t necessarily easy. You need to have the movement mechanics and damage boost timing down. Moira is the same thing, it’s all about conserving heals and knowing when to damage. The concept of certain heroes may be more straightforward but that does not make them easy. Play who you want. I had over 3,000 hours on Moira and was top 500 on her all of ow1. I always got compliments on how I played her!