Another trick to try - is to adjust the closed-loop behavior of how wide of a range and the rate it updates the "fuel trims". How often the MS is allowed to adjust your injector pulsewidth, the percentage step, and the absolute limit, strongly affects driveability and fuel economy in closed-loop conditions. When I had my MS 5+ years ago I eventually got it down to +/- 5% at 1% steps. I'm not saying that's the exact value that you should be trying to hit; every car is different. But, under ideal conditions, your VE table should be so perfect that you shouldn't be needing any kind of EGO correction. That is, however, virtually impossible to achieve, but it's a good place to shoot for.

Bottom line - the VE table is where it's at, EGO correction is for fine tuning.