I have been playing with the VCP 330 since it was released. It's an excellent frame, I replaced the stock grip with a Kimony leather, which I think adds to the overall response and feel of the frame. Personally I have found it to be the most well rounded players frame on the market. The frame has a nice pocket without being flexy, directional control is great, and you can really generate spin with this frame. It's nice on slice, just a great players frame.
I find it very stable while also being maneuverable and cuts through the air better than most frames. With the various VCP 330 I have owned I have had a few under spec at 325 grams and unstrung swing-weight of 294. I actually enjoyed the under-spec frames, they were easier to play with but they weren't as nice/stable as the on-spec frames and didn't produce the same heaviness. The ones I am playing with now are 332 grams unstrung and unstrung swing-weight of 302. Strung with with a 1.25g poly, swing-weight is at 334.
So I guess there might be some frames that might be under-spec so people find them less stable than the previous Tour G and Duel G releases. I had the Tour G, and I agree it was more stable, however it was also a lot harder to generate RHS, it didn't cut through the air like the VCP 330. I just recently got my hands on a Duel G 330, so I can compare, and the strung swing-weight was 341, static weight was also at 335 unstrung. So again I get the references to the older models being more stable, however they are also over-spec.
Also had the 310, it's also a great frame, but you really need to mess around with lead to get it close to the 330 and even then it still doesn't really compare. If you can handle the weight and have the mechanics, IMHO the 330 is the better frame.
I pretty much try most of the players sticks as they come out, I still prefer the VCP 330. Also, I don't modify them in anyway, which is just another reason I enjoy them. I can string them add an over-grip and ready to go. Yonex QC is great overall, but there are swing-weight variances on occasions.