Partial release of the clutch means that the plates are not stuck, especially if you pulled the cover off and took out the plates. Did you have problems getting the pins back under the clutch springs? That can be a bugger of a job, and easy to loose the pins if they ping off.
The other causes of partial release are:
Over-adjustment of the cable. You should only have about 2-3mm lever travel until you see the cable start to move. You say this is OK.
Bent clutch plates. Almost always the steel plates are the ones that bend, usually from a cooked (overheated) clutch. The only solution is to replace the clutch pack.
Worn Clutch basket fingers. This traps the plates stopping them from sliding apart. Dress the grooves out with a fine flat file, but not too much or there will be more free-play in the driveline.
Nigel in NZ
The mouth of a perfectly contented man is filled with .
-- 2200 BC Egyptian inscription