Jaina certainly didn't need a meeting to beat the tar out of Aethas and lock him up.
And just being the representative to other nations would confer a -ton- of influence.
It's a meaningful distinction, perhaps -less- than it was in Antonidas's day when the council was secret, but it's still important.
Saying "Oh, the elves had one guy on the council of six to the humans five + leadership position" is equal just doesn't make any sense to me.
Yes Dalaran's always had a close tie to the elves but they've never been involved in a 'run the place' capacity or even had significant influence past the whole 'well we gotta make a guardian' thing.