I had a second outing of the Judicator on Wednesday and I was unimpressed. Some of the same reasons as spelljammer mentioned. SPD 4 does suck. Also being on a Huge base makes it very unversatile (inversatile?). There was an obstruction in the middle of the board that he had to play around and it took him a bit out of the game.
But most of all, the AOE's kinda' blow. I'd rather have a Redeemer and Vanq. First, calculating deviations off of deviations is annoying. Second, if that first deviation goes wide, the second one is essentially worthless. At least with the Redeemer, if one goes wide, the next one can at least start its deviation from the intended point of impact. And also has a small chance to directly hit, unlike the secondary deviations of the Judicator.
In retrospect, I did forget about its flamethrowers which could have helped it contribute to the game a little bit.
Anyways, still continuing my playtesting. Right now, I'm one game pro Judicator and one game against. I made some mistakes in that second game so could have been more me but a Jud shot did have a deviation of a deviation send the blast so far back that it killed two of my Choir. That pissed me off.