ISCA is right in fighting a takeover of what is really their intellectual property - it is the class association that has built the value into the letters ISCA, why should they give it over to a builder? And why does the builder care about class 41 trademarks in the first place when their business is building and selling boats, not organizing events? The trademarks for building and selling boats are independent of those for organizing and running events so there has never been any conflict - until now.
The reality can be found in the class rules by the two opposing organizations -- take a look for yourself. In the LP version of the rules they have added a paragraph which explicitly gives them the right to change the boat "provided it has no impact on the performance of the boat". This does not appear in the ISCA class rules.
How do you measure whether a change has an impact on performance? Who decides if there is an impact on performance? How do you handle a series of changes that impact performance?
A real class association would have a committee of sailors (class officials) and builders who would evaluate a proposed change BEFORE the change was allowed. LP wants a system where they push changes out based on their idea of what is a good change.
Since they have such a good track record over the past decade on these things perhaps the sailors should simply trust them?