Pace is dictated by the required sight picture to "shoot an A". This is discussed in depth in Brian Enos' book Practical Shooting and the four different sight focuses used in pistol shooting.

Your sight picture is a trade-off. The Dawson sight picture is a tight picture with a more shallow rear notch and thin front post. This gives you a sic accurate sight picture to even further out targets. BUT, it does slow you down a little in the transitions to pick the picture back up again. It's basically too precise for up close drag racing target shooting. You have to learn at which distance you can stop drag racing and start getting picky with the sight picture for more accuracy. The other alternative is to go to a more open iron sight like the Warren/Sevigny sights. Its a thin front sight with a wide and deep rear notch. It's fricken fast like alcohol cars, but as soon as you want to dump head shots at 15 yards, you better shoot extra shots. It's just too sloppy a picture to really get accurate on long shots. Wider front sights are shit, flat out worthless IMO. Finding something between the Dawson and the W/S just doesn't exist right now. Probably the closest would be the fixed rear Dawson and a new Dawson front of the right height for somewhere in-between. Personally, I like the tight picture and practice my transitions to overcome the slightly more difficult sight pick-up.

I can get away with the G34/35 slide release. Almost everyone I know just runs the basic OEM so they don't lock up the slide inadvertently. Toss the Vickers in the spare parts bin.