As I've split out all the new augs into individual slot types there might be some that'll have very few items to slot into (and possibly none).
The leg aug has four items it'll slot into that I know about without checking because I created them and they lie in wait for you
There are five ears I found after searching on Web tools (it's so much easier to use now peterigz added a filter for tier/rank!)
Granted, four of them are class restricted (2x PAL, 2x WIZ) but one of those earrings is all/all and drops off luclin. So long as at least one item exists for a 17 aug, I think it is fine and that 17 aug needs to exist.
There's a slot 18 version of all the causeway 17 augs anyway (they're in the instance now), so I won't change any of the slot 17 augs to 18.
But, if you find that any of the new 17 or 18 augs don't have a home then please do let me know. In that scenario I'll just create an item so it does have a home rather than change the augs. 
Edit: I do realise splitting augs this way makes checking for aug slots harder but remember you can now use #myrank to quickly list all your items and aug slots!