First, let me say that this is the best year of Elimination yet. This is not a grumpy complaining post, but what I think would be a fun addition to increase strategy and teamwork. :)
When you go to someone's profile you would only see 1 of 3 indicators: People on your team, people playing on a different team, people not playing. You would only be able to see what team someone is on after you defeat them. (or perhaps if they attack you as well)
1. It would still reward activity overall in terms of attacks scoring points for your team because you know who is playing.
2. Your team would have to work together to scout targets and build hitlists if you wanted to target a specific team. There could also be a strategic component of sharing targets with other teams lending real value to alliances.