Well, we can't say for sure what the writers have in mind.
But in Charmed there was a similar track. In Season 4, although the sisters vanquished the source of all evil, on personal font, they too suffered from huge loss; specially Phoebe by losing both her husband and unborn child. So they wanted to forsake their powers too. But just then, they were attacked by a witch hunter and realized they needed power to protect themselves too. So again, they embraced their destiny.
PiAnsh forsaking their power would make sense only if they had done the same with Adi. Adi is next to God for makers bbut every time he got saved either by PiAnsh or other good forces related with them like Sarp Raj. So it's nothing but idiocy on their part to remain normal but let Adi and Pari have their powers.
Right now it completely depends on TRP audience. If they like it, makers can continue with the kids with PiAnsh sitting in the background. If not, one way or another they might regain their powers.
I would opt for the second option.








