Only Airtel Website Sucks for for DTH user, you can't to do anything in Website via PC or Mobile
Tata Play, D2h, Dish TV, Sun Direct even DD Free Dish had good website but we Airtel people not had proper website and sometimes their app also sucks.
Bcoz Airtel DTH website allows customer some basic functions like checking balance/validity, recharge etc. while to make other changes customer needs to install airtel app ..this has been clearly mentioned on the website
All operators have their pros and cons so i think we have to adjust and opt for an operator which best meets our requirements / whose services r best compatible with our needs