I've actually never thought of that solution -- here I was all set to snark something like "get more judges", but your comment was the first one I saw; and rightfully so!
A triage is actually a bizarrely simple idea that I'm embarrassed I didn't think of it, even as a person of middling intellect.
There's got to be some reason why we don't triage this way, though, or my faith in the system is at least such that I feel we should have moved to a triage long ago. Would it unjustly allow petty thieves out the revolving door to offend again and again? We have that now, and there's a lot of outcry in urban centers where repeat offenders not getting punished is endemic.
If we created a second track for 'lesser', victimless-type cases, and used that as offer for newer prosecutors and judges, would that help? Would a lower court of newbies be appropriate and workable? It's pipelining, but in court.
But even that idea sounds ooky. But I know you're onto something. I'm sure of it.