In my opinion, centralization of btc will also open up more opportunities. It can become a company like visa or mastercard or any other payment processor widely accepted around the world. At this point in time, many countries prohibit the use of bitcoin, so it is only available in a decentralized manner.
After bitcoin becomes centralized, it might accepted by governments. But Why should we use that? What will be benefits of bitcoin? What will be difference of bitcoin with Visa and Mastercard?
If bitcoin becomes centralized, a bigger problem will appear. Because the main purpose of bitcoin won't be reached.