My experience has been the opposite. When I was using the ProTank 3 with 2.1 ohm coils, anything above 8 watts and it just tasted horrid. No flavor at all and it would start tasting burnt. With the ProTank 3, the only juices that actually had a taste that I could detect was menthol based juices. With the Nautilus, I can actually get the taste of the juice and I don't start getting that burnt taste unless I crank it up past 15 watts. What helps the Nautilus is the wicking holes are much larger on the BVC coils as compared to the ProTank 3, and the Nautilus also has the airflow control. Granted, if I start restricting the airflow below the widest open, then it also reduces the maximum wattage I can run the Nautilus before it starts tasting burnt. By comparing the two tanks, running at the same wattage and almost the same resistance coils (2.1 in the PT3 versus 1.8 in the Nautilus), I get much more flavor and vapor from the Nautilus.
I do agree that the Nautilus tends to condensate the vapor more (every time I go to refill the tank I need to remove the drip tip and wipe down the bottom of the drip tip and wipe out the inside of the top hardware (where the drip tip fits into). If I don't do this, then when I turn the tank upside down to refill it, the condensate drips out onto my fingers. But it's not as bad as "fills up the center tube with unburnt liquid".
That's the thing about the Nautilus Mini--not even one time have I had a burnt taste, not once. With the new cotton coils, the flavor is so vivid that sometimes I cannot take it. Another thing I like about the Nautilus is the monster bottom seal, makes it easy to work with in the wild. Now, I am vaping a Subtank Nano with a 0.5 ohm coil on an eGo ONE battery I just received, and I've got to say it's pretty darned good.