Thank you for your recommendation. Actually the similar feature is there already and you definitely can keep your VHost configuration files separately, though it may not be exactly wildcard-include.
For LSWS enterprise, it normally load Apache configuration hence you can add vhost the same way as apache, including your recommended wildcard-include. Even you configure LSWS Enterprise natively, the Vhost configuration files can be separate file other than main configuration file.
For OpenLiteSpeed, it will be configured naively and each vost configuration will be kept as separate file at defined location from main configuration.