Practice tool with friends

First of all, practice tool is great.

I am just wondering why they don't allow you to do it with a buddy.

I wanted to practice thresh hooking someone right as they come out of a zhonya's timer. But I can only do practice tool alone.

I mean I could do a custom map and practice, but the whole point of practice tool is so you can skip the cool downs and teleport anywhere +the gold etc.

Will this be a new feature added you guys think?

Thanks Rito