Agreed on the dodge action, that's also a great default to have around too when you can't find something useful to do.
As far as readying an action, at minimum it could work like XCOM's "Overwatch" action, targeting the first enemy you see within range.
But it would be nice to give you a choice of targeting options so that you can designate a smaller area, just in case that's useful. But fine leave it as "first enemy in this area" instead of trying to give you full pencil and paper D&D flexibility. There is a UI for picking between options in an action, such as Enhance Ability needing you to pick an ability.
As far as readying an action, at minimum it could work like XCOM's "Overwatch" action, targeting the first enemy you see within range.
But it would be nice to give you a choice of targeting options so that you can designate a smaller area, just in case that's useful. But fine leave it as "first enemy in this area" instead of trying to give you full pencil and paper D&D flexibility. There is a UI for picking between options in an action, such as Enhance Ability needing you to pick an ability.