That is true. If you wish to save more than 1million baht and you feel concerned, you can open a second bank account.
I wouldn't start worrying about this. First, this applies only to the Los Angeles Thai Consulate and only about O-A visas which, in my opinion, these days is the most foolish visa to get with all the nonsense going on about it. What I noticed, but he did not mention, when he was showing the paperwork the proof of 65,000 baht per month income was now 100,000 baht per month.
Consulates, just like immigration, can be very good at making up their own rules. Sometimes when you walk into immigration, you can't be sure what you're walking into. In my opinion, for those who wish to retire in Thailand, do everything within Thailand for obtaining your visa. That way you will have an O visa, not an O-A. If you already hold an O-A, I would look into whatever is necessary to do to get it switched over to an O visa, even if it requires a Thai attorney or a visa agent to help get it done. And, as my dad used to say. "Do it now. RIGHT now!"
The way things are happening in Thailand, if you are going to retire in Thailand, you definitely want your retirement visa to be the O visa, not the O-A. And the only way to get the O visa is to get it within Thailand.
Other than that, I see no reason to be worried about any upcoming changes.