As for the ball cleaner all approve during competition cleaners should be allowed but limited to use only when a foreign substance other than lane oil is on the ball. I have seen bowlers that have a wet rag and use after every ball return and then thrown on top of other balls. I can see where the dry rag proposal came from.
As for the other proposal I have no problem as long as balls are grandfathered in. Most of my balls have balance holes and would have to be plugged. I don't think that the USBC members should have to bare the cost of making a previously approved ball legal again.
Ball manufacturers will just design cores that the dynamics of a ball can be changed by just changing how or where the holes are drilled. Radical has already done that with the FIX. They will find a way to enhance the drilling without motion holes.
And by the way I do not intend to purchase another ball until USBC makes their decision. Why drill a ball today that may need to be plugged or not be able to drill a ball in a way that is illegal today but legal tomorrow.