What you're referring to is an RDA (rebuildable dripping atomizer)? If so, yes, that is good for changing flavors quickly... just re-wick, and change flavors.
However, if you are not mechanically inclined to build your own coils, do not have a firm grip on Ohm's law, and do not wish to expend at least $100 on necessary components/supplies... RDA's may not be the best option.
If all you're after is being able to change flavors at the drop of a hat... I would suggest multiple tanks (of the same type or style). Personally, I have RDA and RTA, Mechanical MODs, VV/VW batteries, and standard eGo's... but I also rotate through more than 16 tanks... some with the same flavor in them so I can keep vaping without refilling... some with different flavors so I can change when I feel the need for something different... some with different Nicotine strengths, for that morning "lift", and lower-levels so I can sleep more soundly.
Multiple tanks may seem extreme, but I doubt many on this forum have fewer than 6 of any given tank, just for the purpose of different flavors (or convenience). Plus, half-a-dozen tanks will cost you FAR less than getting into RDA's.
Don't think I'm trying to stop you from RDA's... no, the flavor and vapor production can be amazing from them... but safety is first, and I always want to point out the cost-factor too. You can get a decent RDA, Mech Mod, high-quality batteries, wire, Ohm-meter, cotton, etc. for all under $100 if you're careful. But if all you want is convenience to change flavors... additional tanks may be the better route?