Just my opinion but I think Snooker helps breaking open the rack as this is a big part of snooker, going into the pack from a ball under the rack is almost identical to snooker. Snooker helps potting and to some extent patterns but straight pool is still a different game with much to learn.
I had never seen it played before last June and it helped a lot to see other players play and how they chose to open the pack. BlackJack also helped me by suggesting leaving more than one break ball. I now try and pick a minimum of two break balls immediately after breaking the balls open and try not to move them (if available of course). I also try to pick a
penultimate ball or two and leave those alone also.
I still feel that 200+ is the benchmark for a world class run though, I live in hope!