Who builds a ship whose sole purpose (with the exception of the AoE nuke) is to do a little more damage when the Advent is losing (its own ships or the titan itself)? Seems idiotic to me. Obviously the Advent Rebels are not for me. I guess the strategy is to spam hundreds of disciple vessels and get them destroyed, thus (counter-intuitively) making your titan a death machine for a whopping 60 seconds? Boy, that sounds useful, compared to the TEC Loyalist titan which is a death machine even without needing its allies' ships to die.
Not quite.
The Eradica is an interesting ship, focus on it's support, and it starts punishing you for it, focus on it, and it will repair itself using it's own support (Guardians are delicious.)
It's ultimate may suck, but don't doubt the power or the purpose of the rest of the ship, Bilun pretty much nailed what changes I think need to be made for it.
As for the Ankylon, really, I don't think there's anyone who doubts that thing does too much damage for the amount of utility and survivability it has.