Hotstar is a domestic born app. Initially meant to stream Star TV contents. In that terms its UI is best (Compared to Zee5, Sony Liv, Voot etc) But when it comes to global streaming giants like Netflix the UI lacks. Hotstar serves everything now-Live streaming, Television programs, Regional and International contents, movies, news, sports, originals. They had tie up with the largest distributors - HBO, Hooq and Now Disney plus.
So Hotstar requires a UI upgradation. It is better to have two different apps, if they bear all this contents. Otherwise they should drop contents from other studios.