Proposed Sona Adjustment
Would it be possible to change her Q, W and E spell, so when you hold down the hotkey for the respective skill, it'll make the range indicator appear and stay as long as you keep holding the hotkey down without casting the skill. And when you release the hotkey, the skill will be cast and the indicator will be gone again.
Most other champions have range indicators visible during cast of before, so it's more clear to determine when your enemy/ally is in range. With Sona you will have to play with locked camera to be able to tell by when approx. your enemy/ally is in range for your skills to work.