Outside of the scenarios, you are correct - there's no drawback to losing a Champion. But aside from the uniques like Golems, there's no real drawback to losing ANY ship. And I don't see a problem with that.
Erm...what?
There is a drawback to losing ships, you have to pay money to rebuild them. This is doubly true for Starships and such.
If you think that having to rebuild your fleet, with resources, is not a drawback, then I guess we're on the same page
Isn't that more like time spent waiting? Resources being infinite and all
Precisely this - refleeting is time. Assuming the loss of the fleet doesn't let the AI kill you, you will get back to where you were. This includes this 2M m+c Mk V starships and Spire Capital fleets. But when you lose a Golem, or fail a scenario, it's gone forever. Failed scenarios cost you unlocks, XP, and can make later scenarios harder. And they can even kill you, given the right (wrong?) circumstances.
Now, if you make Champions cost to rebuild, it's also just time. But that's yet another whammy to losing a scenario. And if it's a major cost, say for BBs, that makes it even worse.
Remember, Champions hit hard - BBs can pull off twice the DPS of a golem - but are fragile.
Edit:
When golems were not frail, even relatively, then you rarely noticed their irreplaceable. Now you do. Given how AI HW defenses hard counter so many of them (arty and hive) and all the others are directly targeted, they all now frail.
If anything, with the gluttony of irreplaceable units, champions should NOT go to far like the already very numerous options of irreplaceable and/or costly in one way or another units.
Yup. Fragile and irreplacable or fragile and expensive are not fun. And remember that the AI gets Nemesis too, and lots of them.
The complaints about champions, for me, all stem back to how boring/repetitive/grindy powering them up is after playing with them several games. In a way the same about FS. The difference is that Fallen Spire gives you a direct win condition if you pursue it fully.
Well, before the Nemesis, the Champions also gave a Win condition... Really, a few waves of Battleship Champions was easily enough to kill any AI HW.