A strict rotation so the fastest microphone stops winning. On a call the quiet half of the team disappears unless the format makes room for it.
For the next forty minutes the fastest microphone does not win. One voice at a time, in a fixed order.
Everyone writes privately first, so nobody's thinking is shaped by whoever would have spoken first.
Go around in a fixed order, one item per turn, no cross-talk until the round ends. Keep going until everyone passes.
Name the themes that came up in more than one round. Those belong to the team, not to one person.
1–2 owned actions from the strongest theme. Whoever spoke least picks first.