Diamond systems are over-rated, IMO. There are lots of indicators on a snooker table...6 spots and 6 pockets..and a balk line, to name a few. But speed and spin (high and low besides side) are variants, as are temperature and humidity.
...and snooker rails are flat edged, reactions are different...also, heavier cloth doesn’t allow spin to stay on the ball as long.
Hoppe developed the diamond system as a teaching aid...a fair amount of it should be dropped like training wheels when one gets to a higher level. This is discussed in Byrne’s book, McGoorty.
When a player like Keith looks at a shot, he doesn’t see LESS than a systems player, he sees MORE.