You are working and have more than enough in savings so they would not accept the sponsorship. Sponsorship is for dependents and spouses. There are likely to be some changes to the DTV, especially for the Softpower option but it is very unlikely DTV is going to be stopped. A lot of rumors but best to ignore and apply. Bonne chance!
You are able to support yourself so no sponsorship is required. Six months seasoning of the 500k is not required in Paris/Brussels. You can find posts in the threads from DTVERS who applied in those cities. Paris is hit and miss with approval can take upto a month some have got it quicker.
Anonymous participant You will be fine applying from Vietnam. You are correct they are used to it hence so many go there and get approved with no problem. triple check your docs, before submitting.
Majority of people in this forum do not apply in their home country I think. Vast majority are approved first time in another country, the system is made to apply overseas. I get what you saying but it is not difficult getting approved outside of your home country except for a couple of embassies like KL..