I am not Ian Farrier and don't speak for him. Having said that:
Printing the plans was never the problem. Supporting builders was.
He regards every boat built from his plans as bearing his name. He wants every outcome to be a good one, both for the builder and his reputation. This is evident in the plans, most detailed I've seen by far.
I would be EXTREMELY surprised if he'd get back into bed with Corsair. It'd only be slightly more likely than him teaming up with Lenneman.
When you buy a set of plans you get a range of options included. There aren't that many different sets to choose from. Look at the web shop. My F82 plans cover A, R, strip and foam hulls, dagger and centerboard. Later they included aft cabin. It's just not that complicated, really.
While plans will not be offered for individual builders to do from scratch you will still be able to buy hull kits to complete boats from various builders about the place. Further I SUSPECT if you can convince him you can build the boat unsupported (having completed another F-boat for example) I suspect he'd sell you a set. The trailertri plans have been unavailable for a long time but he has said he'd supply them if someone desperately wanted to build one.
This is not armageddon.