A course editor was mentioned in another thread by Bimmerman50 which gave me this idea for a new feature. Instead of designing your own courses and uploading to WGT, which AvatarLee correctly pointed out in the other thread would not be feasible, I submit it would be feasible to build your own course using existing holes!
The Course Builder feature would allow you to create your own 9 or 18 hole routing using any hole, any existing tee, any existing pin location, from any existing course.
I'd see a click, drag and drop method to create your own course. A list of available par 3s, 4s and 5s per existing course. Click on one from KI, drag it to your new course scorecard, and drop it in hole #1 for example. Click on another from BPB, drag it to your new course scorecard and drop it in hole #2. And so on to complete your 9 or 18 hole course. Save it and give it an appropriate name. "Andyson's Aquatic Adventure" with only holes having water hazards could be one. "Faterson's Fantastic Fantasy" for another.
Par for 18 could be anything from 54 to 90! Create an executive style course with 16 par 3s and a couple of short par 4s (BPB #2 red tees and KI #3 red tees) for a par 56 course.
Play them only in practice mode of course. Make them available to the public after trying them out. Think of all the possibilities. User originated tournaments on their own courses? Could oppy come close to replicating Winged Foot using existing holes?? LOL
Since it takes WGT a long time to introduce new courses and pin locations the community is crying out for variety....we're bored. This feature provides plenty of variety, something else for the community to do, and lots (probably) to talk about on the forums. WGT could even allow players to rate your new course.
Second Idea along these lines: Build your own CTTH (I got dibs on the mulch behind KI #7)