Clutch Pedal Doesn't Snap Back

IDK the solution.
But my thinking is that if you pull the pedal back, from the top, it seems to me that is an unusual action for the hydraulics to perform.
Ima thinking more along the lines of pulling the TO fork back off the fingers. The factory had an anti-rattle spring down at the BH to do that, but you might need to upgrade it to a more powerful item.
And yes I would re-install the LD Over-center spring.
If you still have a problem, you may have to check the port sizes in the master or look for restrictions in the lines.
Also check your clutch departure, to make sure you don't have an excessive amount. .080 is plenty. You can run less so long as it doesn't grind on the shift from Neutral, into First. You should be able to control that with your left foot, And you DO NOT have to pedal it to the floor; you only pedal the clutch until the synchros are able to perform their job.
Well except for reverse which has no synchro. lol.