None of the queens have the full range of charisma, uniqueness, nerve and talent, + current marketability. Of all of them, Jujubee has the first four but isn't current in the way that even Chad was at the time of her win. It may seem funny now, but Chad stayed connected to more contemporary music.
I do hope Jujubee wins, though. He has a persona, intelligence, humor, great wit, silliness, fine looks and a place in drag.
Shea has no persona. She's good, has grown, but is just another typical drag performer. There's nothing more there. In her own way she's clueless because she doesn't see that what she lacks is a stand, a stance, a personality that is about anything but WINNING in an old-school drag way. She's Trinity minus the pageant sense.
Cracker has a persona but it's a rotten one. No spontaneity. She's over-thought-through, mean in a way that doesn't connect, and so self-referential it comes across as selfishness.
Did the others who are gone have more to show? Maybe not for what the show wants, although I prefer all of them - even Derrick - over Mayhem (another "stands for nothing and delivers only drag," which isn't what the show is built on) and Blair (who has NOTHING but a great look and is a creep underneath it). But you can bet that Alexis, India and Mayhem are targeted before the others still left. They're all fun for a retro-drag do but it's like watching the past.
Shea is OWED (people think), they can't deny Jujubee's talent, and Cracker is the dry surface they can smear things on. No way they're not the final three, and if Ru wants to maintain her independent flair, she'd pick Juju but probably will pick Shea.