You've missed the point. We went from crouch-touch-pause-engage to speed up the process and reduce collapse/resets. But in Super rugby the refs are using the different words crouch-touch-set, but the timing hasn't changed.
There is a basic cadence to "crouch, touch" - it's pretty standard between all the referees.
Where the differences come are at "Set". The referees are advising players (I have heard the instructions myself) that they will not proceed to the "Set" call until both packs are still (which shows they are stable). The referees are not varying the length of time before the "Set" call to try and catch teams out.
It makes sense to delay the call until the packs are still because if you call "Set" when either pack is still moving around you increase the possibility of a collapse on impact which produces a reset.
If both packs are still immediately after the touch, the referee can call "Set" immediately and the overall call will be quite quick.
The pack being still is not easy to achieve - it requires practice and discipline but having spent the last couple of months working with packs to get them still, believe me it is achievable.
The stick the referees have been instructed to implement to provide incentive for packs to get still is that if you engage early more than once in a game it becomes a full arm penalty. If a pack is not still (and therefore stable) it is easy for them to overbalance and engage early.
The combination of these two factors (holding until steady and full arms for going early) is a good thing and will lead to better scrums if teams get on board. From my experience if the coach insists on no full arm penalties being given away your pack learns to get stable pretty quickly, which in turn helps to speed up the call.
If the opposition takes too long to get stable, you must be disciplined enough to be able to stay still - again not easy but achievable if practised.