Welcome to Coffee Snobs ezralimm.
I think youll find the Lavazza oro is stale.
You need freshly ground beans if you want flavour and a slower pour.
"comparable to the "flat white" coffees at some coffeeshops" isnt good enough for me any more.
In fact my first home made flat white was better than that.
Are you thinking of upgrading yet or persisting with the Breville for a while?