I'm no fan either.The whole vv vs vw debate..to each their own. That entire thing is lost on me. Kind of like fighting over the American standard vs Metrics. At some point I might give vw a try just to see what the bfd is until then....meh I am to lazy to bother with it.
The short version is that if all your coils are exactly the same, VW will maintain the same vaping experience, but VV did that anyways. If your coils are different, then you'll be playing with the VW settings, which kind of defeats the purpose of VW.
VV is nice though; dial it in, and it'll maintain the same vaping experience, throughout the battery's depleting charge.
Without VV, you could have:
1) a regulated battery (typically outputs a fixed 3.7v at all times, regardless of the charge state of the battery)
or
2) an unregulated battery, whose voltage drops ever so slightly, as it discharges. If you're sharp, you'll notice a cooler vape near recharge time.
Now... if you don't have VV or VW, but you want to tune your vaping experience, you can use coils with different Ohm ratings. More resistance (higher ohm) means a cooler vape. Lower resistance, results in a warmer vape.
So if you're happy with your gear the way it is (as I am with mine, unregulated), you don't have to do anything. If you "feel the need", then you have to choose between a bunch of different coils, or a VV battery.