As I've said before, personally I think the Course Maker will possibly be the last thing that's listed to be added.
May not be the case of course, which would no doubt be welcomed by many.
But going by the wording on the website, it's been like this for as long as I can remember.
Everything else says "will be added in a future update", while Course Maker says "available at a later stage through an update"
Now I may be reading too much into it, so take it as you will.
Regarding the updates, and from an earlier discussion about GT5 I did some hunting.
And
@NW48 will be happy to hear that I did find one GT5 update with 2 names, one of which is x.xx.x
"There is a bit of confusion about what, exactly, to call this latest version of the game. You’ll be prompted to download update “1.13″, though Polyphony Digital’s formal announcement describes it as version “1.12.572″. Regardless, it weighs in at only 1.1MB."
https://www.gtplanet.net/gt5-update-fixes-top-gear-track-new-seasonal-event/
But on a similar note, looking through GT5 updates for the similar period is quite a sobering read.
Essentially GT5 v1.03 came out Dec 6th, and right through to Spec 2.0 which came out Oct 10th.
Almost spot on where we stand now.
And for those in for some light reading, have a look through all those updates and remind yourselves of just how little PD actually did with GT5 through that period and what a bug-fix fest. it was for 'update' after 'update'.
It's all neatly documented in the link below.
https://www.gtplanet.net/tag/gt5-updates/page/2/