@Gmood1 wrote:I feel your pain OP. I tried to get my old Cap One Platinum's limit increased with no luck. I apped for a QS 3 months ago and tried several times after 60 days with no increase. I then apped for a Venture and low and behold after having the Venture for only a few weeks and passing the 90 day mark on the QS. They gave me a $400 CLI on the QS tonight. lol
Capital one does some odd things. But they sure give terrific SL's on some of their cards!
If you want a real nice limit, I'd app for the Venture and maybe throw the QS in there as well. Hopefully all on the same pull.
I did the double dip on QS & Venture(back to back) and approved instantly. 10k on V and 3K on QS on 8/8.....only 1 pull.(meaning 1 for each agency).
On 9/10, pre-Q showed V1 & QS...approved for V1 for 5K.(did not app for QS, although I should have). didnt wanna be greedy..lol
To the OP...
Consider yourself fortunate that Capital One has allowed you to keep the sweet deal you have now. I had a 2% card with HSBC/Orchard, and when it was bought by Capital One they forced me to PC to a Quicksilver One (lowering my cash back from 2% to 1.5% - which I know isn't that much difference) and they kept the old $79 annual fee. 
In your case, I would go the EO route. It doesn't seem their automation is set up to care for legacy cards like we have, and we all know how powerless the front line Capital One CSRs are without an automated "offer" being available.
Edit: Corrected post to indicate PC was to a Quicksilver One, not a Quicksilver.