I like the straight-eight configuration as well, for SPEED, not necessarily for PRECESION.
Let me tell you about my experiences with them that you may find useful or helpful.
Many years ago, I was a prosecuting attorney responsible for drug prosecutions in my circuit. There were some bad dudes I put away and I was always allowed by my DA at the time to carry anytime I was not in court. More often than not it was a G19 with three-dot sights, but I had a 1911 Commander with the Heine-8 set.
Numerous times I got to go shoot with the local SO tactical-SWAT team and the drug task force guys. When I shot my Glock and Commander side by side, I clearly favored the 1911 two-dot setup on range days that were outside in the sun.
All of that changed when we did low-light drills. Those drills were with targets back lit and us back lit and against a dark target. Suddenly I found I could not get any vertical alignment of the two dots, so I shot high almost every shot, some low, and this was entirely a function of how I held my 1911. Shooting my Glock 19 I did not seem to have that problem. The drug task force guys had three dot setups on their Glocks, because they worked a lot after the sun went down.
I came away from those experiences with the understanding and respect that two dots provide for only horizontal alignment and vertical alignment is, at best, a guess.
So, if I have to shoot quickly and accurately, I'll stick to three dot set-ups every time. On a clear, sunny range day against paper targets that aren't possibly going to move or shoot back, I'll take a two dot for fun. Hope this is helpful and informative. As always, YMMV.