I'd like to see options to have light sources that are player-specific, moving with them as they go.
I'd like to see block/square auras as you find in DND 4th edition.
And I'd like to see how zones can be placed/removed by players for affected areas from powers/spells.
It would also be nice to have player-specific vision, so that one player can be "blind," another can see things in "dim" light, while another can see fine. Perhaps a global lighting setting that is seen differently by different players.