I'm on the range with students several times a month, looking through all sorts of optics, at all times of day and night, in all sorts of weather. A lot of less expensive scopes are "fair weather" scopes.....nice to look through in the middle of day on your flat, KD range, but when you have it out during dusk/dawn, fog, inclement weather, etc., they fall flat.
Then try and pick up color/contrast with them. Again, they work fine on the sunny, flat, KD range when you're shooting at paper targets or painted steel, but try to find a target that doesn't want to be found, one that blends into the background. Or look at several targets that are at similar distances and try to pick out which one is closest.
Now set aside optical clarity and look at ruggedness, reliability, and repeatability. Dial the scope from your zero out to 1,000yds + and back on a regular basis. Run some Box Drills and Ladder Tests with it.
There's a reason why expensive scopes cost so much and cheaper scopes.......do not.
You are exactly correct. Past two matches I had a hard time seeing a couple of smaller plates after the paint was shot off, that's why Im upgrading again for next year.