If the approach is to let low priority items roll over, that just seems like a recipe for dropping the ball.
Are people getting through 133 items in a day? That's 216 seconds per item.
As someone who has compulsively accumulated lengthy to-do lists and buckled beneath the phantom of hopes and intentions of varying importance and ambition I find it enlightening that the possibility of completing a task other than those that are important enough to not have to write down to begin with can be measured by their meaningfulness and address according to this measure.
I gather that the .0050% of information that I consume daily is what is of the greatest priority and the remaining 99.995% is synthesized and iterated over the next day until it reemerges as something important. I suspect that Wiegley completes on average about 5 important things each day. This sounds like a solid baseline.
This is to say, if you don't keep on top of current work, the agenda view quickly turns into an ever growing wall of shame.
I have a pretty weird love-hate relationship with it because of that.
Maybe the 133 items are 120 items of one minute work each, and the rest are conditional or optional task you will not do that day.
Then stop managing them with fancy computers and just do them.