I'm cross-dominant; I've always shot long guns lefty and handguns right-handed using the left eye. It has worked well enough for me to gather a few shooting awards here and there over the last few decades. As my vision has changed in the last few years, I've come to find my left eye is not as overpoweringly strong as as it once was, and I've begun to use the right eye on occasion during long handgun shooting sessions. No difference in accuracy for me, but the speed of acquisition is slightly slower during draw-and-fire drills, as my body is still heavily programmed to line up the gun with my left eye during high-speed presentations.
I've found when shooting steel plate racks that you can't wait for the plate to fall, or even to hear the sound of each hit for confirmation, and still have a decent time. You must shoot and immediately swing on and engage the next target, regardless of the results of the last shot, and then go back to clean up any missed/still-standing pates AFTER you've shot to the end of the rack. With this in mind, the best practice method I've found is shooting small paper plates as "fake" plates. If you can, find out the center-to-center spacing of the plates on the rack you'll be shooting later, and the size of the plates as well (many plate rack plates are 8 inches in diameter, but spacing can vary quite a bit). Set up slightly smaller paper plates (I use 6" dessert/cake paper plates) at the same distance and spacing. Practice draw-and-fire (or present and fire, if no holster is used) at the first plate ONLY for the first 30-50 rounds or so. After you feel comfortable and fast hitting that first plate, proceed to shoot two plates per start, then three, and finally the whole rack (6, usually). Concentrate on hitting the paper plate anywhere, FAST, and moving on to the next one. Then work on a smooth cadence and swing between plates. Finally, once you are hitting the plates every time on each pass, push the speed envelope to see just how fast you can hit them; you might just surprise yourself. Remember your top hit-'em-every-time speed, and try to stick to it in the match. Going too fast generates misses, and misses kill your cumulative time when you have to go back and clean up the dregs. It's ALWAYS faster to get them all on the first pass -- ALWAYS -- even if it SEEMS slower. Using the smaller plate in practice accomplishes two things; it makes even an edge hit on the paper a solid hit on a real plate, and it makes the real plates seem HUGE when you step up to the line on match day!
"Placement is power" -- seen in an article by Stephen A. Camp
(RIP, Mr. Camp; you will be remembered, and missed)