00:56:395 (1,2,3) - I don't think there is a drum roll sound here.
Instead, there is a short hi-hat-like sound 1/3 of the way through, which I treated with the kick slider.
00:57:156 (1,2) - Here it sounds like a drum roll again, but I think the player can handle it without any confusion by keeping the same rhythm and placement as the one before it. There is some space between it and the previous object, so I don't think it will be a problem from a leading perspective.