This is one of the first sections I looked at in vZero. My players tend to stand and pound (having been brought up in D&D) rather than run and fight.
For a while I did a SR-by-SR melee, allowing movment on every SR. Probably the crowning moment was when the party encountered wolves, which circled the party and darted in to attack wherever they could get at someone's back, then retreated. Within a round or two the party had formed a circle, with the most vulnerable people in the middle, and the wolves on the outside. It was beautiful.
But the downside was constant 'fiddling' during combat, which got on everyone's nerves. I've gone to a system of multiple actions per round based on DEX and a roll+Modifier Initiative. I keep cycling through the list of actors until everyone has run out of actions for the round. Actions can be used for movement, attacks and reactions. So there is some sequencing of activity, and a few combat options, but each characters' actions are bundled
Steve