Loose Glidelock lever is a common problem with the 2014 DSSD. I have posted suggested fixes elsewhere but here goes...
BK recommends building up the sides of the lever with JB Weld so that the lever has a tight fit when closed. I wasn't too confident in doing this myself so I tried something a little different with good success.
I fixed my loose Glidelock by using a small amount Super Glue Gel on one side of the lever hinge (the part that folds underneath the thumb pull part of the Glidelock lever). It helps by making the hinge joints stiffer and adds a little thickness for a tighter fit when closed (same idea as BK's fix). I can still open and close the lever to adjust the bracelet if necessary.
Do it at your own risk! The key is to go with a very small amount, I mean really small amount of Gel with each application. You don't want to glue your lever shut. I would not recommend using liquid superglue as you can't control where it goes very well. I used a toothpick to apply a very small amount along the side of the hinge and on the two joints. I did two applications a couple of days apart and haven't had any problems since.