Every event you Listed is dead the moment you would rather tattoo you gentiles then do it again which happened to everyone but the got to catch em all crowd. The duel boxing thing has always been around it was just the RMTs that did it the most since reg players were scared of SE banning them, but as time went on and SE stop really giving a crap about windower so stop caring if people were DB. Really healing wasn't ever that hard if you had a brd that would keep ballad on the rdm, was it more involved then the DD yes but it was just boring as crap once you got into a cycle. FF14 has the same vertical gear progression as FFXI now and if SE is to be believed it has 1mil players. That tells me people care less about gear progression and more with how shinny it is. FFXI niche was never the side grade model it was the "Final Fantasy" name and the "Not" WoW, EVE, EQ.
Not really defending SoA or supporting ff14 so much as calling BS on SoA being the reason why the game is contracting. It still is SE's fault for wasting the money spent on ff14 that would had been better spent on getting rid of the PS2, POL, rebuilding the FFXI from the ground up.