For one, shadowstep, cloak, shadow dance are all buttons we’ve had for YEARS.
For two, replacing Fan of Knives & Ambush for “Shuriken Storm” & “Shadowstrike” just to make us more like a dark magic warlock doesn’t make any sense.
We’ll just have to agree to disagree on all of this, but it more or less sounds like you misunderstand the meaning of being a Rogue.
If your Assa, you should still be a ROGUE; Just as assa you should have a higher emphasis and potency on poisons and bleeds.
If your Combat, you should still be a ROGUE; Just as combat you should have a higher emphasis on being that spec that can be upfront, jarring, stand toe to toe with warriors and still come out on top
If your Sub, you should still be a ROGUE; Just as Sub you should be that guy who relies more heavily on preemption, thinking ahead, hit & running, and most of all, stealth/sdance. Does that mean that Sub should have a bit higher emphasis on dabbling in Shadow-Magic? Sure, but again, should NOT overwhelm the spec to the point that playing sub feels more like your playing a seperate class itself rather than being a ROGUE.
Again, all rogue specs should have all these rogue-defining abilities that we’ve had over the years (slice & dice, poisons, gouge, shiv, rupture, cloak, shadowstep) etc.
What spec you choose should ENHANCE a specific playstyle (a master of poisons, a toe-to-toe brawler, or a stealthy prowler who’s quiet), choosing a spec should NOT essentially make you a different class altogether.