That is my thinking too. If you are in Thailand for 90 days then you report. Nothing changed and there was no need to say anything in connection to the DTV announcement.
They designed the LTR to be different so they specifically announced the change to 1 year reporting.
I think the soft power reasons for the DTV remain very unclear. It is going to depend on how each Thai embassy interprets this justification for this visa. It is going to take time for people to test the system to see what is accepted. People are not going to get answers on Facebook or YouTube.
The questions that annoy me the most are the people asking if they have to do 90 day reports and if are they tax liable if they are here more than 180 days. There are just a lot of people that want to stay long term without really understanding what it means to stay long term.
Why get worked up about this? Just wait for more reports on what is happening at the border. It is still early days. If you don't want to believe what Tod posted then don't believe it. Move on with your life.
I assume by principle you mean savings? They want to see passive income. If you have interest income then submit those documents too. I just have a work pension and Social Security and that all shows up on my tax return.