What do you want to see in LoL?

For your teammates, sure.

I don't think it's a good idea to be able to see how much gold your opponents have though.

for them, id say at least the total gold value of their items wouldnt be too obscene a piece of info to have on hand, you can math it out anyways

individually or whole team, doesnt really matter. just some kind of benchmark. if they have 50+% more gold than you at 20 mins, its gonna be one of those games where if no one makes mistakes, you still lose... but you drag it out to 50+ minutes instead of playing another game.