The catalog block should be rendered using uc_catalog view's filters

The block should count only selected views products and only categories that, with uc_catalog view filters active, still have products. This should not be to hard to implement if instead to run our custom query:

$query = new EntityFieldQuery();
      $query->entityCondition('entity_type', 'node')
        ->entityCondition('bundle', $types)
        ->propertyCondition('status', 1) // Don't include unpublished products.
        ->fieldCondition('taxonomy_catalog', 'tid', $item->tid)
        ->count();
      $num = $query->execute();

we could get filters from view and maybe build a custom query with that filters that only counts the products instead of render them.