Remove font-awesome include?
The theme includes a copy of font-awesome CSS, which increases the compiled CSS size by around 10-12%. Only a fraction is really used, and it could use CiviCRM markup instead.
Ex:
$ grep -r fa-var scss/civicrm/
scss/civicrm/administer/communication-organisation/_reminders.scss: @include fa-icon($font-size-base, $fa-var-angle-down, $gray-darker);
scss/civicrm/administer/system-status/_administer-list.scss: @include fa-icon($font-size-base, $fa-var-angle-down, $gray-darker);
scss/civicrm/mixins/_contact-type-icons.scss: @include fa-icon($font-size-base, $fa-var-user);
scss/civicrm/mixins/_contact-type-icons.scss: @include fa-icon($font-size-base, $fa-var-home);
scss/civicrm/mixins/_contact-type-icons.scss: @include fa-icon($font-size-base, $fa-var-building);
[...]
DataTables and Select2 are also heavily themed, and that theming might be redundant with CiviCRM core.
Edited by bgm