So I have owned an SB-2, an SB-1 and a LB-100 at the same time for awhile.
I also modded my (former) SB-2 to have tone pots. They were stacked Volume/Tones with the ability to isolate them, without volume loss as well. It was a special circuit that kept the stock SB-2 functionality.
Anyway, it was nice having them and it made the bass kind of look awesome. However, in practice I didn't use them all that much except for a light cut. Even the crazy settings you could think of with that control scheme, while fun, didn't pull me that much away from the wide open tone, perhaps with a bit of a different P/J volume blend.
So I'd say after all that, if I could do it over again, I'd keep the SB-2 the way it was. Your amp settings plus picking the right strings can pretty much simulate any tone you can get with a tone pot as far as the audience is concerned. Try a warmer sounding set of strings and your bridge volume could really feel more like a tone pot.
Also, limitations can fuel creativity. Try the volumes at different levels like even 90% P and 90% J. Anyway, I'm sure you know the bass. However the advantage of using that bridge pickup like a tone pot is that you have a mid-scoop when both pickups are on full, but varying degrees of brightness or even "airiness" (brilliance) as you turn the bridge pickup volume down little by little.
I sold everything but my SB-1, as it was just the bass I preferred. I like simple and I found a good set of strings to match my tone preferences. I also ordered a Kiloton recently which is why I sold everything

except one bass.
Anwyay, keep it VV, that's what I'd recommend. But play around with some different strings if you're not liking something. You can get that bridge pickup sound, at various volumes, working like you want it.