Got my warranty scope back, Sig upgraded me to this Gen 2 version.
@chevy_man is right that this version doesn't have locking turrets at all. I guess to be fair, the Gen 1 didn't really have true "locking" turrets either, they just locked on zero. Non-locking Elevation isn't too big a deal for me since it has a zero stop, which BTW is done very nicely on the new design. Losing the zero lock on windage is for sure a bummer though, I wager that was entirely driven by cost. These Gen 2s seem to be retailing for a bit less than what the Gen 1 models originally came out at.
Another nice change is a redesigned parallax/illumination turret that's much lower profile, about even with the size of the windage turret now. They also threw in two extra accessories which didn't come with the Gen 1: a sunshade and a removable throw lever that works pretty well.