@electracity I got mine replaced and the new one is much better, it is now what you have. It is not "perfect" but it is not unsafe. But I had a "defective" windshield on my model X to begin with.
The original windshield had double/triple vision both at night and daytime. Both daytime and nighttime glare and light distortions were so bad that I painfully decided to stop driving my car as my main transportation vehicle a few days after I picked it up in March. It took a month to get the windshield to replace, during which, I only drove it for short distances (10 minutes intervals) before night time as my polarized sunglasses helped during the day to reduce some of the glare. I was afraid that I would miss pedestrians or bicyclists at nighttime due to light distortions on the windshield that would completely distort my view of the road! You know the report I made about clarity at one foot above the dash vs lack of it. As for my new windshield, I do not notice the double vision if I don't focus on it, which mostly is visible at night and if I point it out, my passengers would see it too.
If you beelive you have a "defective" windshield, then one option to consider is to leave it at the SC and ask the manager to drive it at day and night (for 15-20 minutes) to verify it. I am certain that if they find a problem, they would likely replace it under "customer preference" guise.