Not really. Aside from an arguably better unique, his other abilities are pretty comparable to the other capital ships. Especially Tarkin.
His basic is a targeted assist with more ooph. Ackbar's basic is two hits with a random assist that also grants protection up to the assisting ship. Mace and Tarkin's basics deal damage and a status effect you'd probably have an ally try and afflict anyway.
Art of War buffs and debuffs, but it's unwieldy and support units aside they won't make or break a battle. Also health recovery != protection recovery. I'll happily take Tarkin's TM boost or Mace's targeted taunt and recovery instead.
Tractor Beam Projectors damage all ships and grant turn meter. Every other capital ship has an ability that deals damage with similarly good benefits (Tarkin also has an ability that grants turn meter). Mace's can be spammed under the right conditions.
His Ultimate is an "I win" button. So is Tarkin's.