About will division, dadaji should have only given half his property to Ramakant and the other half to kalandi she is his own blood as well. Ramakant divided everything between his two sons equally but forgot his daughter which is again completely wrong. The house he made it on Atharav's name because he probably knew how his family would treat Sujata and Atharav and did that to secure their place. However he could have divided the house between the two children as well just like he did with the property.
None of them need to follow RK's akhri ichha I have no idea why the entire family is behaving as if it is God's wish, thy blindly got Ravish married thinking it as RK's wish and pushed the boy in a loveless marriage, if only they didn't worship RK as God and treat him like your wish is my command and let Ravish choose for himself and not impose decisions on him.