I very much like the metaphor -- it's the one that makes the most sense to me and it echoes my own views very nicely. I did cringe at the word "ville" though -- I presume you're shortening "villanelle", but "ville" is really misused and doesn't work at all for me. The bad news on that front is, I can't think of a form that rhymes there. Give it time, something may come to me...
Now, I'm afraid I'm not so dismissive of meter changes, since they really do make a difference to me
Besides, it's not so hard to get it reasonably consistent -- I'm not particularly concerned about the kind of feet in each line, because in a ballad style like this you can get away with variants, but the number of feet is important in my view. Vary between stanzas -- consistently 
-- by all means, but not within. S4 is the worst culprits, so I'll just see what quick fixes I can come up with before breakfast.
How we manipulate syntax and sin -- this is presently 5 feet
dictates-- what could or should have stood-- 4 feet
no casual blight or grammar call -- 4 feet
but with passion splash our blood. 4 feet
If it were mine, I'd be making S4 into a nice neat 5-foot block of iambs, as it's very close now and it's kind of the middle of the poem, so here's as good a place as any.
How we manipulate syntax and sin (I also thought "how syntax we manipulate and sin" but that's just me being a smart arse)
dictates-- what could perhaps, or should have stood--
no incidental blight or grammar call
but with an artist's passion splash our blood.
I'm actually less bothered by the fizz -- it's got an acid undertone to me, and that makes it work. I'd like to see that line reworked for meter though, to:
We etch, create and fizz
Sorry, see what you get when I don't have coffee first?
Now, I'm afraid I'm not so dismissive of meter changes, since they really do make a difference to me
Besides, it's not so hard to get it reasonably consistent -- I'm not particularly concerned about the kind of feet in each line, because in a ballad style like this you can get away with variants, but the number of feet is important in my view. Vary between stanzas -- consistently -- by all means, but not within. S4 is the worst culprits, so I'll just see what quick fixes I can come up with before breakfast.How we manipulate syntax and sin -- this is presently 5 feet
dictates-- what could or should have stood-- 4 feet
no casual blight or grammar call -- 4 feet
but with passion splash our blood. 4 feet
If it were mine, I'd be making S4 into a nice neat 5-foot block of iambs, as it's very close now and it's kind of the middle of the poem, so here's as good a place as any.
How we manipulate syntax and sin (I also thought "how syntax we manipulate and sin" but that's just me being a smart arse)
dictates-- what could perhaps, or should have stood--
no incidental blight or grammar call
but with an artist's passion splash our blood.
I'm actually less bothered by the fizz -- it's got an acid undertone to me, and that makes it work. I'd like to see that line reworked for meter though, to:
We etch, create and fizz
Sorry, see what you get when I don't have coffee first?
It could be worse