I really love the idea of fleets that have a few overpowered ships mixed in, it makes Legio fleets a lot of fun to fight, but only when it's *a few*.
Fleets that can throw ten Daemons at you just feel cheaty and dumb.
The only thing that makes a ship that can regen armour to full in like 15 seconds feel reasonably possible to fight against is that it doesn't have equally-strong ships that can cover for it. If it's chased away or gets distracted, its allies will be torn to pieces and then it can be singled out, making it possible to deliver the huge amount of sustained DPS necessary to kill it.
But once Daemons actually make up the backbone of a fleet, everything fun and interesting about fighting them gets flipped on its head and I feel like I'd rather be fighting doritos.