Tuning wise, CVVC allows for more control of velocity (if that makes any sense). That simply means you could choose where certain consonants cut off the previous note rather than having the consonants slowed down by "Consonant Velocity."
For example:
http://vocaroo.com/i/s1LDvvFrTYO4 (The quality is bad on this website but you can still hear it)
The first was VCV slowed down by Consonant Velocity. The second was CVVC using the VC note. If i wanted to, I could adjust the length of the VC note to stop the "a" sound earlier. You can't exactly do that with a VCV bank. This is why CVVC has the potential to sound better than VCV, if done right. Plus, there's less to record, less to oto, and when you tune, you could use the VC notes for extra "umph" if that makes sense.