Top of my wish list also Ozzie. We fly out west on Fires and many diverse missions where easy custom location(user waypoint) is paramount. The extra steps, (select from menu or direct press, more options, edit custom location, select flight plan, enter waypoint ID, search, select, done), is cumbersom for us also. If we could access a 'Direct To' like you suggest even from custom waypoint enter/edit menus would improve UI for the likes of us.
What I would prefer is, Long press screen,- then on pop up menu 'enter custom location' - then 'Direct to' option.
Again, top of my wish list for a unit we are installing in Bell 205 for contract work.
Carl