Chanel's leather selection quality has definitely gone down. Same thing happened with my iridescent ivory rect mini. The top flap's leather is noticeably flatter than the rest of the bag. The quilts on the flap are not puffy at all. I was bothered in the store when I first saw it. The bottom piece of leather (underneath the flap) is much more puffy. I ended up taking the bag home and keeping it anyway, since it was one chance to get a super unicorn that had a tonne of people on the waitlist after me. After some time has passed, it doesn't bother me that much anymore as I would rather own this bag than having to source one from a personal shopper.
However, the same cannot be said for other less unicorn bags in my collection that were imperfect to begin with. As time passed, I ended up letting them go one by one. Each time I picked up one of these bags, the flaws from day 1 would jump out at me all over again. For the cost of these bags, they should all be perfect from the get-go.
In your case, it is an REV bag that will be made again. Since beige clair is a staple forever classic that would probably remain in your collection forever, I would absolutely try to exchange for a perfect one, instead of settling. If it bothers you enough now to question it, it might end up bothering you in the long run. If an exact exchange is not possible, I would return it. Yes, I say this despite the pending price increase! These bags are too expensive to settle. Don't forget that there will be a cost to sell it too should you change your mind and decide to let it go in the future (fees, consignment etc..) so the difference due to the price increase might end up breaking even.