Looking at the old growth its had issues for a long time.
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Yes, Pheons can very widely. Pheno runs are worth it once you nail cloning. Some Breeders have also breed better for longer so great/ wanted traits are there more often.
The no media hydro guys will argue that pot size doesnt matter but in general yes pot size matters. More roots more fruits.
Yes, terroir makes a big difference. Huge in the wine game. Kevin Jodry mentions it allot. Check him out on you tube and everything he is in. His voice may annoy you but he is articulate and knowledgeable in all aspects of growing.
heres one of his vids: