I ran into this issue as well. I came up with a solution that works for me, and might be of interest to someone else. I have my AppTable component that can be used by a parent component with as little code as possible. This works great for me, as now I can quickly build 100 tables, and they will all have consistent look, feel and functionality. And, I’m able to use custom cell templates for each one if I need to.

Relevant parts:

// AppTable.vue
// Dynamically build cell templates
template(
  v-for="column in columns"
  v-slot:[`body-cell-${column.name}`]="props"
)
  // Allow a column to provide a component
  q-td(v-if="props.col.component")
    div(:is="props.col.component" :props="props")
  // Allow for parent component to provide custom cell template
  // If parent doesn't have custom template, display column value
  q-td(v-else)
    slot(:name="`body-cell-${column.name}`" :value="props.value") {{ _displayCellValue(props.value) }}

// UsersTable.vue
.users-table
  app-table(
    :columns="columns"
    :settings="settings"
    :do-request="doRequest"
    :do-batch-action="doBatchAction"
  )
    template(#body-cell-roles="props")
      q-badge(
        v-for="role in props.value"
        :key="`role-${role.id}`"
        :label="role.name"
      )