While I don't want FDev to spend more development time on PvP (given the imbalance of resources spent on gameplay styles), I am surprised they don't at least try a beta CQC with "bring your own ships" mode.
No rebuy, just pewpew each other with whatever you have saved (like ship transfer, but instant CQC), and maybe some default builds.
Don't spend much time on it; push it out as a PC-only beta; if it goes down favourably clean it up. If PvPers ignore it, just cancel it.
I am still hoping they do some fully-voiced single-player missions, like the tutorials but expanded, with your own ships.
The modified version of CQC you suggest has no capacity for salt gathering, it would go the way of vanilla CQC