I dunno about the Nautilus 2, but I completely hated the original Nautilus; it changed the flavor to something I didn't even recognize.
If you want good flavor, then you need an RDA, preferably one that has a tight draw, so you're not diluting the flavor with a lot of air. And you may need ejuice with a higher-than-normal percentage of flavoring, if you're having trouble getting good flavor from "standard" mixes. It took me until I'd been smoke-free for almost 2 yrs before I could even START reducing my flavoring down from 31%, and after 3 yrs smoke-free, i still use a bit over 25% flavoring -- and I use an RDA with arguably the most saturated flavor possible. Some people's tastebuds are more damaged than others, and take much longer to even begin recuperating. It's necessary to recognize if this is the case, and not throw out the baby with the bathwater -- vaping absolutely works, but one of the BEST things about it is how minutely it can be customized for one's own personal needs. It is NOT one size fits all, never has been, and never will be.
Andria