What did that do to the full sear engagement? The first stage of the pull drops the sear down most of the way out of engagement then the last pull-the second stage- drops it the rest of the way. Also, does eliminating the "creep" effect the overall safety issue of carrying the gun cocked, safety on? Also, would constant battering by the bolt (in it's function as a bolt stop) effect the fine/close engagement of the sear after it is fine-tuned?
One of the reasons the armies went with the two-stage pull a century ago was the huge benefit from having a lot of sear engagement. Think rough usage: running, dropping into firing positions and breaking your fall with the rifle, using it as a club, etc. Less chance for accidental discharge in field use, in other words.
