My wife never changed her name on her Thai ID where she is still listed as "Miss". Her Thai Passport has her maiden name as well, but her US identifications (Social Security, Naturalization Certificate, Drivers License, Passport) all have her last name the same as mine. Our three children all have my last name as well. When my wife travels to Thailand, she brings a copy of our Marriage Certificate to prove her Thai name and her US name are the same. Usually only the airlines need to see this. When she travels, she uses her married name. She only provides her Thai Passport to Thai immigration. Sometime they ask to see the boarding pass and in those cases she also shows the Marriage Certificate. She uses her Thai ID to purchase property in Thailand. I have never been required to sign any documents indicating that all the funds for the purchase are her funds.
In my humble opinion, my wife's decision not to change her name on Thai identification documents has been a wise decision. Since we live in the US, there hasn't been a need for us to register our marriage in Thailand. I'm not worried about having all the Thai property in her name and I've never asked to have a usufruct or any other type of request to protect myself even though my wife works as a homemaker taking care of our family and doesn't earn any income. All of my children born in the US have received Thai Birth Certificates and Thai Passports. Their US names are translated into Thai and appear in both Thai and English on these documents. My son is the only one that doesn't have a Thai ID because my wife doesn't want him to face the Thai Military Conscription requirement. He is 22 and after he turns 30, we plan on getting him registered in a Thai house book so that he can receive a Thai ID. At that age, we are told that he won't be required to register for the possibility of service in the Thai Military. Both of my daughters are registered in a Thai house book and have received Thai IDs.
Fortunately, I haven't had to worry about purchasing land in my children's names. However, we do plan on having them inherit all the Thai property my wife has purchased over the years. Hopefully there won't be any issues with them receiving these properties in the future regardless of the fact that they are "Wasian" (my daughter's term) and have (mostly) Western sounding names.