This feels like a lot of separate things for one power in my brain so just to re-word it so it feels more cohesive, we would suggest just having the ability to move center of gravity up to two directions. They can go up or down or northwest, and if they use up and down, it ends up making the person stuck in the air between the two.
Can do 1 person at a time, 2 only if they put in a LOT of energy into it and for a very short duration. Line of sight so can't just randomly do it to a person in a different room.
ADDENDUM
Can do 1 person at a time, 2 only if they put in a LOT of energy into it and for a very short duration. Line of sight so can't just randomly do it to a person in a different room.
DOES THAT SOUND OK.