God forgive somebody playing a class they enjoy, instead of something extremely faceroll. How do you expect a new player to learn the ropes & get better at the game if they main a skill-floor class such as balance druid or arcane mage? I've played the game since early TBC and started twinking in WOTLK, I know for a fact a tier 3 or 4 spec can make a huge impact in a pug, they just need to be in the right hands. You keep talking about "encouraging/justifying new players" but nobody is doing any encouraging besides you; I am simply claiming that a non-FOTM spec can be impactful in different situations.
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Im sure you have no frame of reference as to how endgame PVP works, but CC is the KEY.
We are talking about a bracket with 0 sources of dispel outside of trinket, so that makes every CC extremely valuable.
If you can force a healers trinket with cheap shot (or sap, knowing 19 twink players...) then follow it up with a 6 second fear, there is no reason you shouldn't be able to get a pick, resulting in the upper hand during a team fight.
8 seconds leaves you out of combat, which could result in a 2nd sap as well. (follow it up with a polymorph and you just kept the healer out of a fight for 8 more seconds...)
You're inclined to believe that there are more pros than cons with this class, but at the end of the day, getting picks is the name of the game, and if you can synergize crowd control, you'll dominate the playing ground and consistently have the upper hand in a competitive atmosphere. You argue that warlocks burst damage keeps them out of the discussion, even though they can instantly do 600 damage Between a CB/CFG/EF, which is 50% of the average twinks health.
As far as I'm concerned, you've been in the twink community for a month or two, doing nothing but trolling. You are the LAST person who should be spilling any advice on any topic, inside or outside of this game. I think its great how you make an effort to promote your bracket, but stay in your lane until you actually break things down and earn some credibility. Not all specs are viable, but the majority (even the underdog ones) are in this bracket. If someone wants to play class X over class Y, let them. If they so chose they have every right to create another character and venture further.
I hope your pond is connected to the Dalaran sewers, because you need to hope in the arena & get some insight as to how PVP works.