It's definitely less costly and more efficient, because the lines are better delineated and it's vertical now. You're basically moving up the system with your appeals, and you can't keep going sideways all the time, which reduces costs and increases transparency.
It's also true that, because of the formal role of laypersons within the system, there is, I think, a better sense of legitimacy, from the perspective of a layperson who might be a complainant, to know that there are going to be other laypersons within the system who are also going to have a look at what's happening. It's not just judges judging themselves but also laypersons and lawyers. That will also ensure diversity within the system, which is also critically important for the legitimacy of the system.