There's really no need to delete the character, just tone what's he's supposed to be able to do, so it makes sense to the Star Wars Universe.
As Chazy has already said, he's not going to have any resistance to force push and force pull, and if he's hit by force lightning he's going to be far more vulnerable then a regular person, because his machine based parts are going to be fried. So his supposed victories over Sith, even Sith Masters, makes no sense, he'd be at a huge disadvantage. Not to mention, even against any Jedi who's aware of the techniques like Disable or Destroy Droid, it would be a one shot wonder to lock up his mechanical bits or make him explode.
Also, as Chazy mentioned, Obi-Wan was able to duel Grievous at no disadvantage in strength, both Sith & Jedi have access to techniques to boost their speed, stamina and fighting strength (Force Speed, Force Valor & Force Rage). So being seven foot tall and full of metal bits doesn't mean he has an advantage either. Grievous was very dangerous because he could use four, sometimes five lightsabers and rotate his limbs and his waist turning himself into a buzzsaw, combined with the fact he had been trained by Count Dooku, who was considered one of the best swordsmen in the Jedi Order before his departure. So comparing your character to Grievous in terms of why he's dangerous with lightsabers doesn't actually apply, because aside from both being cyborg, they have nothing in common.
As for being around for two hundred years making him more wise then the Jedi Masters, that's ridiculous, lots of Jedi Masters live far more then two hundred years. Some races naturally live longer then two hundred years, and the Light Side of the Force can keep a person healthy and young for decades longer then would be natural, extending a lifespan considerably. In your post you also mention that he knows the future of the galaxy better then any Master could hope, but these guys can actually see the future, your character can never compare to that. Now, I know in your last post to this board you said he's not all mystical and Yoda like, but IC you basically implied he was.
As for him knowing as much about the Sith as the Jedi Archive.....no. Just....dude what? Those things have thousands of years of history with the Sith built up, your character wouldn't know a single percent as much as the Jedi Archives.
Now, there's no reason to delete the character, there's always room for a brash, abrasive, crude, rude killing machine. Just don't go overboard with what he should be, and try to make him something he shouldn't be. Acknowledge his weaknesses as well as his strengths.