How can we improve WHMCS?

We have clients that have dozens or even hundreds of domains, and sometimes they need to make bulk changes. WHMCS already supports this, but they have no way of selecting all domains at once.

So clients have to go to their domains page, and click the check box beside each one individually - for dozens or even hundreds of domains. The second they miss a checkbox by accident, it loads the domain details page instead (since they click inside the domain row), and they have to go back and do the whole thing all over again.

Easy solution to this is to have a "select all" checkbox in the top row, which we have been manually adding in ourselves for years now. But again I'm shocked this isn't there by default.