The new satellite is going up at 77W to replace the sats Dish has there right now which are crappy. Dish is leasing the whole satellite to use it for their Eastern Arc setup. So nobody other than Dish will be using the satellite. Eastern Arc is MPEG4 and in most cases 8PSK Turbo which only Dish receivers can see
It seems quite unlikely that DISH Network is going to turn any of their satellites over to FTA at 77W or any other orbital slot. They'll probably park it somewhere as a back up, shut down the TWTAs and let it wobble a bit more.
I'm pretty sure you can't economically convert a satellite designed specifically for one type of signal (Ku band circular polarity) to another type.