Personally I think it's ironic that people will "stop coming to attacks" like you all forgot what the game and defences were like right before Cortina - and afaik defence tanks still don't hit too much, especially advents. On top of this it's a new world where no one is max level yet, so your players are competing with premium gaps, level differences and no counter set to cortina yet for the average content.
We have all been spoiled by the damager's monopoly on fun and the instant satisfaction of a tombola dopamine hit.
You know fine well what new worlds are. Just wait for the newest OP set that swings too far in the particular direction you like, and then spend a lot of nuggets on it.
Maybe wait longer for formula changes to actually fix the game and make it fun and fair again. Or play on a stable world where a new set doesn't absolutely destroy PvP, because if you'll remember, this set was a direct response to the easily-obtainable damager sets and the fact defences couldn't win battles.
I'm sure in time there will be a specific tank set for attacks, like you say in the OP.
Look at it this way, it's a chance to build your forts while the game catches up on its own power creep, and the rest of the content in the game closes the premium gap - by levelling up to compete with the elite players. New worlds go from 0 to 100 overnight when a tombola hits.... and then it takes a year to catch up. And we keep perpetuating it.