JLC did develop a multi-adjustable deployant buckle as well for the higher end Sphero and Gyrotourbillon models but those were in precious metal. They could have a similar design in titanium or other metal in the future for other models.
My Parmigiani Transforma Rivage has a multi-adjustable deployant buckle in titanium that is AMAZING as it opens in increments of 1.4mm up to about 7mm without changing holes in the strap for an EXACT fit.