How can we improve WHMCS?

We would like to have the possibility to create new Custom Categorization of reports instead of others.

/* ============================ REPORT META ============================ */
$reportdata['category'] = "Billing";
$reportdata['title'] = 'VIES – Reverse Charge (Monthly, No Currency)';
$reportdata['category'] = 'Billing'; // exact, case-sensitive
$reportdata['description'] =
'Per-invoice detail for B2B reverse-charge services (EU customers with VAT ID). '
. 'Monthly selector, no currency column. Reverse-charge accepted when VAT=0 or client is Tax Exempt.';
/* ============================ INPUTS ================================ */

Fore example