Well, we could do but i'm not suggesting, as well you know, that we reduce oversight, rather that your pov that the jury system gives oversight, is possibly incorrect.
Juries are made up up on non experts, easily swayed by the Police.
But yes, its possible that changing the courts system, a bit like pretty much everything we do or try to do, would just be a huge fuck up...... in which case, we carry-on with 4 or 5 year waits for justice, which will then be rarely served.
The more you look at it, the more its obvious that the UK has been run into the ground.