This is a development which, at best, for all practical purposes, which might serve /prove as an added source/breeding ground for the dreaded war /battle of wits, in turn the inevitable woeful litigation.
For a dilation, look up the Post on FB @https://www.facebook.com/swaminathanv3/posts/1582687691807511. Perhaps, the only beneficiary will be the ones in law practice; who, according to an eminent Expert/doyen of the Bar, are in no small measure contributors to the so-called 'stimulated litigation'. Cross refer Posts in social media, available for free, on a diligent Google Search.
The law administered after Prakash Vs Phulavati was as you opined but the same is morally right but legally wrong and against the Ganduri Koteshwaramma case, the plain language of the act makes it clear that the application of the act is retroactive. So Danamma case delivered on 1/2/2018 by apex court restores the right of the daughters giving them coparcenary right relying on Ganduri case.