I can grip the pistol in my left hand, and by using just the index finger on my right hand I can easily push the slide back so that it aligns with the frame. It requires no effort to do this.
The alignment is more a cosmetic issue than a mechanical one, and I've seen this quite often (sometimes, to a much greater degree) on other Sig Sauer guns like P220s and P226s... but what concerns me is the statement I've quoted.
No effort at all... no recoil spring resistance at all? That's... something where I'm going to have to take apart a 1911, stare at the linkage and timing for awhile, and figure out how that's possible. I have a terrible memory these days and need to "refresh".