I have not logged into the PBE in a while.
For Drop in spectate, can there be two options:
1) Friend only: You can only see your friend and his/her team, so you are able to still talk with him and not have the 3 minute delay, didnt show gold diffrence, etc. (I very much like this idea and I think summoners will too!)
2) Regular spectate: Spectate as it is, 3 minute delay, can see enemy gold and positions, etc.
Just a suggestion that I think will go a long way.
If this is already the case then... oops. I'll figure out tomorrow.