At least the Japanese chadao requires Japanese matcha. I think at a
minimum a WuYi chadao should require a WuYi tea. I understand gongfu
is anybodys idea of making tea with little pots and cups. If not then
English tea is the ultimate gongfu. I dont mind arbitrary rules so
long as it is presented upfront so people cant hide behind technique
as a substitute for insight. Over the holidays I witnessed TEAVANA
selling more gongfu sets than tea. The blogs are full of my tea setup
occupies more counter space than yours. I think something is lost in
formality for its own sake. I occasionally go to a Japanese dojo that
serves food. It is part of student training for health and humility.
You have to request a pot of tea. The pot is considered a conspicuous
object that detracts from zazen. A bowl and chopsticks is the formal
service. Over the years Ive reduced my conspicuous tea consumption to
a Pavina with infused leaves. Heating water as in a kettle is part of
nature. All my other tea objects are hidden. Minimalism is beauty,
formalism is clutter. In Japanese zen as soon as I say, it is not so.

Jim

PS A zen practioner of the Japanese tea ceremony once told me it is
the undoing of the doing. He said most schools teach it as the doing
of the undoing which leads nowhere like a Koan.