I think I've always casted counterspell without the information. A waste of ressource, definitely. But not so much of an issue in the end.
This is what I have in mind to select multiple targets (30sec video - sorry but I don't know how to resize and I dont know why it doesnt always work here...)
It would obviously help with spells like spells like bless, bane, sleep,... Currently it's tedious to choose who we want to target.
But it could already give us a lot of control over many reactions Hellish Rebuke in the video, but also with AOO, Riposte, Shield, eventually ready, why not as a part of smite for AOO,...