I think depending on your own personal circumstances the DTV is very appealing. I considered that and the Thailand Elite Bronze visa before ultimately settling for the Non O based around my son. The DTV is actually so popular that even though it's technically a tourist visa it's really hit the bronze elite visa application numbers since being released, to the level that they are going to discontinue offering anymore bronze elite visa until they rework it to make it better value for money.
Im not on a DTV but I've never actually showed them a printed copy of my Non O. What you can do of you're concerned about getting any issues is laminate an A6, slightly larger than a passport, copy of you e visa and just keep it in your bag. I saw someone going through immigration with one last time and they just left it in there passport.
If you're registered on the website and doing your own TM30 it's probably easier to avoid any potential complications in the future by the doing it again. I think this is one of those things that vary from office to office.