I am astonished at seeing how people can ever keep choosing, among products with similar characteristics and performances, the one that will or could give them troubles.
There are a few makes that produce sails in the same league (at least) as NP ones: Gaastra, Maui Sails, North Sails (strictly in alphabetic order), maybe others. None of them have had the same problems with masts (in recent times at least) as Neil Pryde, none of them provide or try or threat to provide reduced or limited warranties on masts. Why should one still buy Neil Pryde race sails then?
More: having a mast replaced is not a solution, unless one has a back up and/or replacement is fast enough to avoid the new sail sitting unused for weeks while the conditions call.