Claims of how easy it is are greatly exaggerated. Raithe outlined something that has existed for 7 years now, casters eliminating the need for melee DPS. This didn't just happen with shiradi, it happened early on in this game, 2006-2007 era. Shiradi has nothing to do with it until 2012. WHen casters were circle kiting wraiths through firewalls and killing drow blackguards that melee could barely hit in 2006, the "NEED" for melee DPS was all but circumvented. People play melee for fun, not because they are needed.
The exclusivity agenda is transparent at this point. You outlined how you don't want something easy enough in game to allow entry into EE content with a high success rate. Your Atari analogy oversimplifies how this is played, but if shiradi is an atari joystick, then DC casting is a NES controller - with 2 buttons that get pushed a lot and another that gets pushed once in a while. A few more buttons doesn't make it any less of a one trick pony. DC casting, as Raithe pointed out, has contributed just as much to not needing melee DPS in this game as shiradi has, and it began that contribution in 2006, where shiradi only entered the equation in 2012.
Ease of play has nothing to do with the complaints about shiradi, and that has been debunked several times over. Its ease of EE entry that has people up in arms. Exclusivity.
I have also explained quite well how gating entry into EE hurts Turbines revenue stream. I have yet to see an an answer for how nerfing shiradi and denying easier entry into EE would help the game financially.
Still awaiting your answer to my specific questions.