Why does Janna's Q still not have an indicator that shows her allies which direction it's going?

Sometimes your allies don't know what direction you're sending Howling Gale, and that leads to misplays. If they had an indicator, it could help them with setups. Unfortunately, Riot doesn't seem to want to add this in when it'd clearly be a helpful QoL boost for Janna. Why is it that we can't have that?
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