As per I know about Sony TV they mostly don't care for TRP comparing to others TV channel like Star/Colors/Zee!
Sony TV used to launch show which airs less than a year or hardly 1year 6months.. But others Channels used to air long running shows only for TRP! For example, In Star Plus they launched "Yeh Jaddu hai Jinn ka" last year & that was supposed to go off air on February! But it got extended couple of months ago because of it's TRP increased.. They brought new track which totally destroyed the char of male lead Aman! Here I means Sony Tv isn't like that.. They will end the season & bring season2(like Beyhadh2) with new concept instead of bringing stupid concepts or destroying the chars..
Haasil was Romantic-Thriller! They ended as per the story line.. So Beyhadh2 will also air till the end 2020 only if it's gets extension also!