I would like to add something about the UI since i haven't seen anyone talk about it.
First of, The drain a familiar has on the summon gauge. In the patch notes it says that it has to do with the defence of the monster. But i don't know more about it. How much does defence affect the drain? It would be much clearer if the you got shown the drain your current setup had, instead of just showing it's defence.
As for the summon gauge, it's also unclear how much time you have left. The gauge starts at 2000 but that doesn't tell me aniyting if i don't know the drain my familiars have. the only thing it tells me is a rough precentate of the gauge i have left.
And last of all the wording on the potentials of familiars are again unnecessary vague. As an example, the effect that says "restores HP/MP by a small amount" how much is a small amount? It's like a potentials with %attack said "Increase attack by a small/large amount".