I watched 10 different JP Shadowverse streams today and yesterday.
For reference, each streamer had around 2k to 10k viewers each.

From what I saw
>Every streamer spend around $200 to $500 to craft 2 or 3 decks and play right away.
>The meta seems to be consolidated on Dragon and Portal, with a bit of Rune on the side.
>The streamers had a clean road to Rank A because incomplete f2p decks cannot compete at all.
>A streamer had a Win Streak of 35 matches until he faced another streamer with Portal and lost
>The ONLY challenging or difficult matches the streamers had, was when they faced other whales with complete decks
>90% of the matches ended from concedes on turn 4 to 7 when someone bricked their curve
>A streamer spend 2 hours talking about random shit with chat while he waited for the verification email because he refused to play Ranked without his RAGE bragging titles from SV1
>After he finally played people started he reached Rank A in less than 1 hour from f2p conceding right away