I know I'm a little late to the "What powers should entities have" discussion, but I had a thought. Since players species are currently overlapping some anyway, what if entities were able to control the movement of their species? That way those who wish to increase contact between players would be able to with more reason then "they just kind of bumped in to each other". The way I'm thinking of it is that it would be less of a power and more of a role-play facilitator. Also, it seems like some people are moving them anyway.

So yeah, just a thought.