Darth Maul

I think with his zeta he can make it into the arena. Maul and palpatine get stealthed, have crit immunity at the start of each game and every time they evade. (Will be nice in aoe meta including having crit immunity.)
Yoda with battle meditation zeta as 3rd toon. General kenobi as 4th(I know, not as a leader?!? Whaa). He will be good for the amount of foresight and also an auto taunt on a crit, so the enemy can't focus down my highest dps threat.
That brings me to who my 5th will be. Of course anakin is the highest/best choice, but I think aayla will do very good because she has a counter attack, and with her counter attack she can stun and/or call an ally to assist. If another teammate gets called it's either from palpi(shock), gk(foresight),yoda(tm+possible foresight), maul(massive damage).
This is the team I am gunning for and am really stoked for it.
So yes, I think maul is worth it, with certain builds I am sure he can become something we have yet to see

Maul leader, EP, Vader, DS and.... wait for it.... old Ben. Think about it. Leave OB without mods.

He seems like a counter to droid teams, since his AoE attack inflicts dazed, which should prevent the turn meter gain HK-77 provides to droids as a leader. If Darth Maul has a zeta leader ability he provides crit immunity to Sith at the start of the match, which also negates HK-77's leader ability if it is a full Sith team