Mechanics are not the problem or issue it's the efficienty to form a 12 man group instead of a 6 man party. They could reuse a content like Naryu Lab or Sundered Nexusu which requires less time to form a group to go in with and not to wait over 3 hours for people to join or whine about gear and eventually trap in or not accomplish anything in the time that you've spent creating an alliance.
Asking for TT gear to get TT gear is just absurd made requirement by the people that don't know how the requirements work in this game. Take a look at NS it used to 700-750+ then it spiked to 850/950+ because of enrage timer and story provided you with that which is fine, but now you need 1.2k because of what? People set up stupid requirements, I don't say that getting 1.2k is hard but asking for 1.2k for NS is just a joke...
This event could be handled better indeed but that's not going to happen because they simply don't care anymore, dedicating more into useless patches and cosmetics it's fine but not fixing bugs inside the game AND optimizing it for ONCE would be to smart for them to do. Now the girding part, looking for a 12man takes twice as long as looking for a 6 man, so the time you find a 12man will be the time where you would want to stop playing the game because it took you over 3 or 4 hours to form an alliane of 12man, including that it would make your farm for the even less efficient and it would also put you back with your precious time.
I don't run anymore Lair,Soguns as i already got my 1k runs through farming hard when those dungeons gave something good like GOLD and Materials or Pouches, as of now the old content is scraped off like a meet off a kebab at my corner store.
and no I do not see what you are hinting at, story provides you with Lucent gear, you don't need to farm, now do you see what I am getting at? We could have an awesome event by reusing OLD good CONTENT like Sundered Nexsus, Naryu Lab to use those instead of the content that is very hated and became dead when everyone got their soulshields and they decided to give the soulshields by story because dead content LOL.
Now you see what I am hinting at? the game is no longer Blade&Soul that it used to be.