With the change to mechanic, and the seeming desire by Turbine to make crossbows the ranged weapon of choice for rogues, why don't you go one step further and actually make them useful by eliminating or vastly increasing the 30' requirement when rogue is using a crossbow.
The limitation just seems so arbitrary and so small a distance, making ranged sneak attack combat almost a pointless affair, because at that point you might as well do melee damage and get the advantages of subtle backstabbing.
On the point of subtle backstabbing having 2 branches, one ranged and one melee would also help a great deal in making ranged sneak attack combat more viable.