Kevin, I think you summed it up best - more in love with the idea, and worried about the functionality for you personally.
Use a little Blu-Tack (I'm sure you know what this is, from your audiophile perspective) and stick a couple of your extra knobs on there. It'll look cool; who knows, maybe you'll even feel better about the appearance, and if you do, maybe you'll even play better! (though it would be a major setback to try to turn one and have it fall off...).
I'm halfway serious (no LOL here). Look, we've had people who have put in a dummy hum canceller just for the looks, with no intention of ever making it real. That's fine, it all depends on what you want.
Personally, I've never had a Series instrument, though I do have one CVQ on my bass, and two on my SuperFilter - and I would simply not be happy with a switch. But I'm not playing live, or recording, or trying to quickly switch between reproductions of specific songs/tones. I'm just looking for my own sound (which is mostly just one), so the fine tuning is much more important than repeatability and quick changes. Again, to each his/her own.
The volume options are a different matter, and I can't quite keep the options straight in my head. I happen to be a single-volume-and-pan-man myself, and we exhausted that discussion elsewhere(s). But in the absence of a pan, you would likely enjoy having the master volume, and I'm pretty sure that wouldn't break anything for you.
Don't mess things up just because you've got some money burning a hole in your pocket, and are perhaps swayed a bit by thinking top of the line is best. It may still not be right for you.
You can likely add the MV for a lot less than a couple of CVQs, and even though it may not look quite as complicated, my guess is you'll be more comfortable with it.
Just a thought, nothing else. Good luck.
-Bob