Idea for spectating live

It would be a very good idea to add in the feature to spectate your friends normal games live and remove the enemy team's position and wards of course. There have been many ocasions where I am in voice chat with my friends and they are also in a game. I want to wait for them so I start spectating them but I am a whole 3 minutes behind them and can not really enjoy watching them play because I am not seeing what they are seeing. I think that many other players incuding my self of enjoy adding this spectating feature so we may watch our friends play live and talk to them while they are playing, it would be a lot of fun. Thanks for reading this is just a suggestion and I don't know where else to put this.