There is such a small pvp community nowadays,
How about an easy built in idea, of making the tournys open for public to spectate and cheer for others. maybe even with reviews afterwards (with or without being able to see builds). This way new Players can learn from better Players to spectate in tourny format instead of searching for twitch streams.
Also if you do it like gw1, where a global announcement appeart, when somebody won Heros Ascent for example.
Then this would give maybe some Attention to the existence of the pvp gamemode.
Also a Problem why new player don´t like to play pvp is the hard gatekeeping ( i mean you just gettin rolled over and over at start).
A Gamemode which give new player or pve player who want to start pvp, a chance to learn and improve would be great ( and not unranked to be fair)
Maybe something similar to codex arena in gw1, that you maybe get a preset of classes or builds allowed for 1 week and then roll to next ones. So the new players aren´t loaded with 36 possible elite specs at the same time to learn the game slowly and steady.
Just some ideas :)
/cheers