Add a passive to Phantom Dancers making it so when you die, it has the ghost of your champion dancing over his corpse.

Actually, what would really be great, is to increase (e.g. by 50% - 100%) the MS bonus, but only apply it for 1-3 seconds when you start moving in a new direction (or start moving), and put it on a 3 - 5 second cooldown. Hence it would encourage "dancing" (i.e. kiting).

Item active to increase move speed by 20% and attack speed by 10%? Would make the AD role less right click if one of their core items had an active.