In paper you can say this and it would be fine if you're referring to them as main Eidolons because they're utter garbage there.
But if you use one as filler Eidolon in the other spots **
with an attribute the same as your Kamihime party** you get an extra boost for them being that attribute that is around 650 Attack if your party has over 40000 total Attack, making them potentially 1600 Attack + 600+.
Then again this is just temporary since you're most likely not going to get a full mono attribute MLB'd SSR Eidolon grid, but as soon as you get one with better stats than the Lilims of course you're throwing them away
**Recap:
They're temporal garbage filler but not completely useless**