I'd make shadowstep stacking up to 3 charges. That's better than this damn OP sprint.
And probably remove preparation and change it into 2 stacking Vanish/Bomb/Disarm/Sprint. Also shadowblades is stupid ability, i'd replace it with the passive that makes your backstab damage 30% more, as it's been in the Cataclysm, these days backstab does least damage, it has less priority than this dumb hemorrhage. It makes you idiot spamming crap inda face, that's not like "sub style".大嫌い
Also i'd return the talent that made your gouge last 1.5 sec more.
There are a lot of ways that could make this game more dynamic. And harder.
The second part is the reason why Blizzard didn't make it the way we would want it to be.
Current game makes me sad, 'cuz it is about to get even easier each addon passes by. 8th season had been the best by its difficult.