I also have my doubts. The DTV is a game changer but it’s too open. Thailand has notoriously been difficult to work and live in legally and that’s worked well for everyone.
Many Thais I know accept the business of high season. But they like low season also. With this visa it’s a 5 year high season because every man and their dog can figure a way to get this visa. The 500k isn’t that high, and an employment letter these days is easy to produce