Iloka brings good size, long arms, sound tackling, and he rallies to the ball. In the Vikings highlights, they used him as a box safety (which you can do when you have the second best free safety in the league behind you) very similar to how Richard used Kam Chancellor in Seattle. Bengals used him as a centerfielder, which isn't his strength, but perhaps Marvin Lewis prioritizes sure tackling from his last line of defense.
He's not exceptionally fast but he runs under control which is a welcome change to Heath who plays out of control, running full speed, consistently taking bad angles. Heath may be quicker than Iloka, but his instincts are awful. Iloka also has decent athleticism so you can get creative with your match-up's and coverage schemes.
Again, he's not a world beater but he's an improvement. I'm excited to see how Richard uses him.
I'd still love it if we took a Juan Thornhill or Darnell Savage to put a true athlete (with instincts) at the back end of this defense. Xavier Woods isn't terrible, but he doesn't do enough for me. Our safeties have been allergic to the ball the past decade. Give me guys with the speed to make up ground and actual ball skills.