Re: Sasukes EMS
Sasuke does have Itachi's abilities though. There's differences, but the techniques are the same.
You're not the only person to not notice that Tobi has never been shown to possess the EMS design that was shown belonging to Madara Uchiha. It's part of what has kept the Obito theory alive for so long. Kishi has undermined Tobi's Madara claim at seemingly every turn and has never drawn those eyes on his face. At this point, it's likely because Tobi isn't really Madara.
R.I.P. City of Heroes
You will be missed.