Gary ,
I'll see this objection and raise you : 1. cleaner tramp (compared to the boom to tramp system i'm using now ; which is superior to the ubiquitous and outdated block to traveller setup I.M.O ). 2. more reliably uncleated (in emergencies) , because you don't have to "shoot" the sheet to uncleat ; cleat is uncleated parallel to boom. 3. Way better feel in light air 4. better sheet positioning for crew....