We stayed in a 1 bedroom standard last month. We were on the 4th floor across from the bus stop (room 4103). We had a great view of the Illuminations fireworks.
There are 3 basic views with standard - close to the elevator will be above the valet entrance, farther down the hall will face the driveway, then the end of the hall faces the pond and tennis courts. Some of the tennis court views you maybe able to see MGM. You should be able to see the Epcot fireworks from most of the upper floor rooms (except facing the tennis courts). Be aware that the rooms at the end of the hall are quite a long walk from the elevator. The part of the building closer to the entrance has 5 floors, the middle and end is only 4.