If you want temp control (and pretty accurate TC), say, if it's the one mod you will bring with you daily somewhere, and you'd like to have pretty accurate TC for chain-vaping on one device, say, then certainly having a DNA mod is useful. If you plan to mainly vape in wattage/power mode, well a DNA mod will also be (potentially some non-TC mods have excellent boards) perhaps more smoother and consistent and etc. However, you would then be using less of its "DNA capabilities" so to speak, and you'd have to decide if it's worth it for you. If you want something like "Replay" which is coming out now with the newer DNA devices, where you can "set and repeat" that perfect vape, (in either TC or wattage mode is so far my understanding) then it may also be useful for you. If interested in either of those functions, I'd say it would be for you.
If not interested in either, well, there are plenty of non-DNA mods that can get you a perfectly good, serviceable vape, and I guess you'd have to determine if the price is worth it for you. Etc.
Anna