I agree that comments like Kostis's above are about as much as you are going to get on announcers demonstrating their knowledge of golf course architecture. Or, something like Faldo going on a bit about Lester's work at restoring a CB design. That was a rare treat.
But let's face it. They are announcing the playing of golf, not the designing of golf, or building of golf. The discussion is always going to be dominated by comments on swing habits and changes, equipment, ball striking and putting techniques, along with personalities of players. Only to the extent that the ball and impliments interact with the field of play- that is playing the game- will elements of what the field of play is designed like come into the commentary. GCA is an afterthought to the announcers. Ball striking, putting, course management and strategy, along with colorful descriptions of players are the announcer's primary focus, with GCA in a very secondary role as it relates to those activities.