I think the proposed changes make sense keeping the class up to date and want to implement them for next season.
Other suggestions; why not lift the sail cloth restriction on the main, give the option of eliminating/relocating one set of secondary winches, lift restrictions of #/location of padyeys, extend the track for the pole to deck level.
Most of the proposed changes will not drastically change the performance of the boat and will only make sense when replacements are needed anyway or to customize the controls for the crew.
In my opinion a well sailed "stock J/30" will still be as fast or faster than a "tweaked" average boat.
