I would think that will remain the case until either Iloka takes the job or Heath fails in a way that makes it clear that the coaches need to give Iloka the job.
Put it this way: In 2017, we started Heath and Byron Jones. Heath was the strong safety. That didn't change until Heath made enough bad plays against the run that Dallas switched Jones to strong safety. That didn't change until Jones made enough bad plays against the run that Dallas started putting Kavon Frazier in on run downs.
Heath is a better pass defender than Iloka, so I'm sure Dallas would rather have him on the field. Whether he stays there, though, is going to depend on if his run defense is tolerable. I'm for a more proactive approach because we've seen too many mistakes by him in run defense, but I think Dallas will give him every chance to prove that he deserves to retain the starting spot.