Much needed, overdue, suggestion!
We're able to see when our team mates' summoners are on or off cooldown, and for how long they are on cooldown if they are. But what I'm confused is why can we not see our team mates' items' cooldown? Hourglass, Frost Queen Claim, Talisman of Ascension would be very valuable information to know from and to your team mates. Maybe even include their ultimate's icon in the team mates tab in the same function as summoners that we can mouse over and get information about ( damage, cooldown ). Although the latter may be cluttered information, but still...
I'd really like to know when my team mates' items are ready for use.