I don't think there is anything wrong with the current system. The question is whether it meets the needs and goals of the majority of the UCA or if another system would be preferred by the majority.
I looked over last year's calendar and there were 20 UCA events (counting a stage race as one event) and one event was cancelled (Harvest Moon) resulting in 19 events that were held. I think the calendar was probably about as full as it's going to get but I may be wrong on that.
The proposed change would allow someone who consistently places high in the state to also go to an event outside the state, go on a business trip, attend a family reunion or vacation, and miss a week due to illness or injury and still be in the hunt.
Under the current system, if you miss a few events you can drop significantly in the standings even if you place high in all the other events. As such, high attendance is a key factor. The proposed change will shift some of the weight from attendance to placing high. A person who consistently gets, say, 1st place will likely still need to attend more than 10 races so his or her rival doesn't get too many 1st places. Thus, it will still require racing a good percentage of the races but missing, say, 3 or 4 events won't be devastating.