How exact are you keeping with the original? I notice that you included reference voltages for the pots for example. If you're open to a little interpretation, I would HIGHLY recommend using the LM13700 instead of the CA3080, as it's still manufactured. Then you have the other half of the LM13700 to either use as a sine shaper, a modulation index VCA, or maybe even a slew for example.
Another thing might be to AC couple the exponential input like the linear input. I would also increase the cap size to allow for lower rate modulations to work better. Something between 1uF and 22uF works well IMO.
You might want to make the integrator op amp a single. I've done it both ways, but settled on using a single op amp after noticing a little bit of odd behavior using dual/quad types.
I absolutely love the VCO-1. In fact, the basic core is where many of my own VCO designs started out. A little while down the road, a little advice from Thomas Henry and Dave Brown (among others) and I'm still using quite a bit of it.
If you're interested a couple of other things I changed are:
Using an LM311 for the core comparator instead of the discrete transistors. The transistors work fine too though.
I would also recommend on the board layout, providing a footprint for a monolithic matched PNP pair for the exponential converter. SSM2220 is nice, and not terribly expensive. (I would also keep the discrete footprints as well. It adds options for the builder.) You could use a THAT 340 and it would take care of the exponential transistors, and also the pair of NPNs in the core comparator at the same time, or better yet the ones in the sine shaper if you keep the NPN based one.
One last item for now. I have a sawtooth shaper that will work with this VCO. If you're interested, I could export a schematic for it tonight.
Anyway, just a few ideas based on my own experience. Your schematic looks good from the short time I looked at it. (at work right now...) Clean and easy to follow.
Happy to chime in again after I look at it more if you like.