CalyxOS dialer

So apparently CalyxOS Dialer has integration with Signal, looks interesting feature. It has Apache licence. Is this better to iodé dialer?

But it can already done manually
It only asks you if you want to dial via gsm or signal. The rest of the dialer is aosp.
If you install signal you can use it for dialing or not.
I never figured out for me, whats the real benefits of the calyx dialer is…