Overwatch in Xcom to name one is a great tactical option that is planned in advance. Such option(s) exist in many tactical turn based game and I disagree that it is a failure.
With all options available in DnD, it would add a lot of depth to combat on top of adding a fun gameplay.
In the end, not reacting a shove with feather fall because you may have to counterspell a fireball and then not using your reaction not to waste a spellslot to counter a firebolt is not a lot more than "planning".
