Jar Jar being a Sith Lord would've totally redeemed this movie
The list of evidence supporting this theory is long, and obviously there were massive changes after the backlash. If you're not already on board, Jar Jar (an animated character for whom every single frame is a deliberate choice) can be seen mouthing the words of other characters at pivotal moments, waving his hand immediately prior to characters making pivotal decisions, messing around in the ship right before the hyperdrive goes out (R2 actually notices and zaps him), mocking Qui-Gon in front of Anakin, is ruthless at taking out droids like a drunken master, does a massive somersault, and is responsible for the Jedi meeting Anakin in the first place. He's also constantly seen behind and near Palpatine (even before the characters met) and both are from the same planet.
Of course, Lucas did the same thing with Yoda in Empire, with similar motivation: allaying suspicion. Imagine how hated Yoda would've been at first if he hadn't revealed himself for an entire movie.
Note too how shoe-horned "Count Dooku" is, who came from nowhere and when you see him in ATOC it's a head-scratcher. "Uh...some guy...great." It was supposed to be Jar-Jar; Yoda would've walked in, accused him, and he would've pulled out a lightsaber and the audience would've lost their minds even more than they did at seeing Yoda do the same. It would've been one of the most unexpected and iconic moments in Star Wars, beyond "no, I am your father."