Oh hey I can just save time by going:
2.) There's a DEFINITE speed decrease in USSJ. Everyone, USE YOUR HEADS PLEASE. If USSJ had NO DRAWBACKS, (SUCH AS A SPEED DECREASE) then it would have been ENTIRELY superior to normal SSJ, and thus EVERYONE would have used it since there would be NO REASON NOT TO. It's LOGIC. But you see, -=THERE WAS A DRAWBACK. THAT WAS SPEED; THEY LOST SPEED. WHICH IS WHY VEGETA DECIDED NOT TO FULLY USE IT, AND WHY GOKU DIDN'T USE IT AT ALL.=- I even gave QUOTES, from the characters themselves, when they talked about how it decreased their speed. I'm repeating myself for the third time here. But I'm telling the truth. If you just STOP and THINK it'll make SENSE. They wouldn't have denounced USSJ if it was nothing but an improvement. They denounced it because you lost something from it.
Maybe you should read it this time. Speed decrease there is. Common sense, use it you should.