This is a question of opinions - there isn't a standard for using multipolygons - it's just your preference, and opinion. 
 The problem is that you think it needs "fixing" when in reality, it doesn't.  Multipolygons are not correct in my opinion and I won't be mapping that way when mapping courses I want to map. There is nothing damaging about lines not being completely correct - I can point to plenty of boundaries, roads, buildings, etc. that aren't "properly" aligned, but the vendetta you seem to have against golf course mappings are the only ones you seem to care about.  Taking it upon yourself to "police" the way others map courses is a battle you chose to take on, on an open source project.  Good luck with that