Yes that is what level caps do. The difference here being that you still have to continue to grind exp once you reach that point or you start sliding backwards very quickly. Please remember that to act as a limit on growth decay must consume all exp earned since the last death. That is not 10 minutes of lost game play. That is not an hour of lost gameplay. That is days of lost gameplay, more if you play it safe. If death decay is not meant as a cap and will remain at a fixed 10 minutes of playtime it is more palatable. If it is truly meant as a cap the amount of lost exp will be absurd.