Wizard1200

If a character with a higher turn order attacks an enemy with a lower turn order he should get a buff (for example + 5 accuracy) to make initiative more important.

Preparing an attack or spell should be an action that can take more than one turn and executing a prepared attack or spell should be a separate action that happens instantly: A player would prepare an attack or spell first and select the target as soon as the preparation is finished. This would remove the need of retargeting an attack or spell.

As Purudaya already suggested the power level should be increased by 2 if you reduce the radius and decreased by 4 if you increase the radius to make spell shaping interesting.