Its ironic isn't it...Fans always want more, and it seems to me that Drake stuff released since the first Fruit Tree compilation has been reeling in punters over the years, feeding a thirst.( and making the industry a considerable sum)
Most of the stuff is inferior, and was never expected, least of all by Nick Drake himself, to be commercially available.
I've loved Nick Drakes music since I first heard Five Leaves left as a student in the 70's.To me its timeless, and I never tire of it.
I would advise just buy the three glorious albums, and leave it there