Interestingly, Claw Sharpen is legal with Baton Pass (pre-evo move), whereas Swords Dance never was. This means that Shedinja has a very unique niche in baton passing Claw Sharpen boosts. Not that I expect it to be very viable with sandstorm becoming even better and entry hazards, but it is worth noting in any case.
This is probably the biggest thing for Shedinja. Ninetails and Politoed getting Drought and Drizzle, respectively, is nice but with so many Pokemon being able to abuse Sandstorm, it could easily be harder to take away than it was in Gen 4.