I don't think Mace Windu needs a huge revamp, but certainly a fix to be sure.
**************
My only real issue with his kit is the way his Expose works in his Unique.
I wouldn't touch his Primary or Leader at all.
What I'd like to see is his Unique (Shatterpoint) combined into his secondary (Smite) in a way that leaves the target Exposed after he debuffs & strikes it.
Then with the TM gain from it he might be able to hit it right away again or someone else would, but either way its removing that stupid "Random + % Chance" mechanic that either doesn't go off or goes off on a completely wrong target.
Instead let him hit who he want's & leave them vulnerable for a Follow Up.
Call the new ability "Shattersmite"
*************
Now, for a Unique, that I would totally come up with something new.
I was thinking about some sort of improvement to his ability to tank & have some focus for helping Jedi &/or fighting Sith.
Level-1 = 5% to Defense (For the fight) & 5% Chance to Taunt (for 1 turn any time he takes an action OR for 1 turn any time an ally is hit... thoughts?), for every Jedi Ally or Sith Enemy.
Level's 2-7 = +1% to either ability alternating (Taking them to 8% each at L7)
Level-8-Omega = +2% to both abilities to max them at 10% each for each qualifying Ally/Enemy.
Call it "Guardian of the Order" or call it "PeaceMAKER" to go with his "We are keepers of the peace" line from the movies.
************
Without Jedi/Sith on the field, 10% will seem weak.
In a full Jedi group, hmm 40% isn't bad.
As a Jedi Group facing a full Sith Group, well 90% Defense/Taunt Chance should make him quite "tanky".
Thoughts?