Also Dweste, look at the Benchmade website. They offer a yearly "tune up" service for $5 (for return postage). Costs about $3.20 in the US to mail it out in a padded envelope. No RMA is required.
You can also toss in a note mentioning what specifically us bugging you, your concerns, and ask for the appropriate torx screwdrivers too.
But I'd first adjust that torsion screw - it's the pivot screw at the front of the handle. Mine once came back real tight, and I loosened it back a bit (driver was included).
If you do decide to send it back, turn around is a touch over a week. I would also ask that you consider sending a note about the looseness out of the box. Perhaps there's some QC issue at play that they should be made aware of.