3E,
It is possible that the passing of Res 4 is indeed the "crack of the door" that the cons and ultra cons believe it to be.
I think that by leaving the UPC the cons and ultra cons will certainly be contributing to the possibility that the UPC could change quicker and faster than it would have.
I believe there is a good chance that over the next 15 to 20 years the UPC may move toward having the PAJC salvation view of
Acts 2:38 as the common denominator but begin to allow "holiness" issues to be defined by the local pastor
If that happens I think you could see a move away from the undefensibile extra biblical stances against makeup, jewelry, pants, etc for women not to mention the uncut hair doctrine.
I also believe the passing of res 4 could see a shift in approach to so called "holiness". I believe the merging technologies has convinced many preachers that you can no longer base Christian lifestyle around a laundry list of do's and don'ts. That OP's need to start teaching a Christian lifestyle based around a person personally applying Christian principles according to the Word of God, leading of the Holy Ghost, preaching, teaching, etc.
It will be a difficult process as there is much security in measuring ones salvation and ministry by the very visible requirement of saints (well, female ones anyway) in old time Pentecost.