I also hope they bring queuing back.

Since 1.19 went live we can select a cure and select a sub-target while still casting the previous spell -- but if we press to confirm the sub-target before the first spell completely finishes, it can take a second before we realize it didn't register.

Add to that the new beastmen strongholds like Zahar'ak where you sometimes have 30 players and monsters around, and it can be very hard to see if your character finished the previous spell.